1157155 has 4 divisors (see below), whose sum is σ = 1388592. Its totient is φ = 925720.

The previous prime is 1157131. The next prime is 1157159. The reversal of 1157155 is 5517511.

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

It is not a de Polignac number, because 1157155 - 2⁹ = 1156643 is a prime.

It is an Ulam number.

It is a Duffinian number.

1157155 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1157159) 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, 115711 + ... + 115720.

It is an arithmetic number, because the mean of its divisors is an integer number (347148).

2^1157155 is an apocalyptic number.

1157155 is a deficient number, since it is larger than the sum of its proper divisors (231437).

1157155 is an equidigital number, since it uses as much as digits as its factorization.

1157155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231436.

The product of its digits is 875, while the sum is 25.

The square root of 1157155 is about 1075.7113925212. The cubic root of 1157155 is about 104.9857879479.

The spelling of 1157155 in words is "one million, one hundred fifty-seven thousand, one hundred fifty-five".