1356250261 has 4 divisors (see below), whose sum is σ = 1356544800. Its totient is φ = 1355955724.

The previous prime is 1356250249. The next prime is 1356250277. The reversal of 1356250261 is 1620526531.

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.

It is a cyclic number.

It is not a de Polignac number, because 1356250261 - 2¹⁵ = 1356217493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356250201) 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, 140251 + ... + 149608.

It is an arithmetic number, because the mean of its divisors is an integer number (339136200).

Almost surely, 2^1356250261 is an apocalyptic number.

It is an amenable number.

1356250261 is a deficient number, since it is larger than the sum of its proper divisors (294539).

1356250261 is an equidigital number, since it uses as much as digits as its factorization.

1356250261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294538.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1356250261 is about 36827.3032002073. The cubic root of 1356250261 is about 1106.9124654322.

Adding to 1356250261 its reverse (1620526531), we get a palindrome (2976776792).

The spelling of 1356250261 in words is "one billion, three hundred fifty-six million, two hundred fifty thousand, two hundred sixty-one".