1115157 has 4 divisors (see below), whose sum is σ = 1486880. Its totient is φ = 743436.

The previous prime is 1115131. The next prime is 1115189. The reversal of 1115157 is 7515111.

It is a happy number.

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 not a de Polignac number, because 1115157 - 2⁷ = 1115029 is a prime.

It is a D-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 (1115117) 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, 185857 + ... + 185862.

It is an arithmetic number, because the mean of its divisors is an integer number (371720).

2^1115157 is an apocalyptic number.

It is an amenable number.

1115157 is a deficient number, since it is larger than the sum of its proper divisors (371723).

1115157 is an equidigital number, since it uses as much as digits as its factorization.

1115157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371722.

The product of its digits is 175, while the sum is 21.

The square root of 1115157 is about 1056.0099431350. The cubic root of 1115157 is about 103.6999797589.

Subtracting from 1115157 its sum of digits (21), we obtain a square (1115136 = 1056²).

The spelling of 1115157 in words is "one million, one hundred fifteen thousand, one hundred fifty-seven".