1101253261 has 4 divisors (see below), whose sum is σ = 1101607452. Its totient is φ = 1100899072.

The previous prime is 1101253249. The next prime is 1101253267. The reversal of 1101253261 is 1623521011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 960380100 + 140873161 = 30990^2 + 11869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101253261 - 2⁵ = 1101253229 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 (1101253267) 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, 172390 + ... + 178663.

It is an arithmetic number, because the mean of its divisors is an integer number (275401863).

Almost surely, 2^1101253261 is an apocalyptic number.

It is an amenable number.

1101253261 is a deficient number, since it is larger than the sum of its proper divisors (354191).

1101253261 is an equidigital number, since it uses as much as digits as its factorization.

1101253261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354190.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1101253261 is about 33185.1361455698. The cubic root of 1101253261 is about 1032.6720019406.

Adding to 1101253261 its reverse (1623521011), we get a palindrome (2724774272).

The spelling of 1101253261 in words is "one billion, one hundred one million, two hundred fifty-three thousand, two hundred sixty-one".