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1330204261 = 13110154231

1330204261 has 4 divisors (see below), whose sum is σ = 1340358624. Its totient is φ = 1320049900.

The previous prime is 1330204243. The next prime is 1330204283. The reversal of 1330204261 is 1624020331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1624020331 = 13711854163.

It is a cyclic number.

It is not a de Polignac number, because 1330204261 - 213 = 1330196069 is a prime.

It is a super-2 number, since 2×13302042612 = 3538886751965112242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330204361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5076985 + ... + 5077246.

It is an arithmetic number, because the mean of its divisors is an integer number (335089656).

Almost surely, 21330204261 is an apocalyptic number.

It is an amenable number.

1330204261 is a deficient number, since it is larger than the sum of its proper divisors (10154363).

1330204261 is a wasteful number, since it uses less digits than its factorization.

1330204261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10154362.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1330204261 is about 36471.9654118064. The cubic root of 1330204261 is about 1099.7807444545.

Adding to 1330204261 its reverse (1624020331), we get a palindrome (2954224592).

The spelling of 1330204261 in words is "one billion, three hundred thirty million, two hundred four thousand, two hundred sixty-one".

Divisors: 1 131 10154231 1330204261