1101255157 has 4 divisors (see below), whose sum is σ = 1149135840. Its totient is φ = 1053374476.

The previous prime is 1101255139. The next prime is 1101255179. The reversal of 1101255157 is 7515521011.

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: 7515521011 = 8369 ⋅898019.

It is a cyclic number.

It is not a de Polignac number, because 1101255157 - 2²⁷ = 967037429 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 (1101255107) 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, 23940307 + ... + 23940352.

It is an arithmetic number, because the mean of its divisors is an integer number (287283960).

Almost surely, 2^1101255157 is an apocalyptic number.

It is an amenable number.

1101255157 is a deficient number, since it is larger than the sum of its proper divisors (47880683).

1101255157 is an equidigital number, since it uses as much as digits as its factorization.

1101255157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47880682.

The product of its (nonzero) digits is 1750, while the sum is 28.

The square root of 1101255157 is about 33185.1647125640. The cubic root of 1101255157 is about 1032.6725945821.

Adding to 1101255157 its reverse (7515521011), we get a palindrome (8616776168).

The spelling of 1101255157 in words is "one billion, one hundred one million, two hundred fifty-five thousand, one hundred fifty-seven".