1157520 has 160 divisors (see below), whose sum is σ = 4499712. Its totient is φ = 239616.

The previous prime is 1157503. The next prime is 1157531. The reversal of 1157520 is 257511.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21814 + ... + 21866.

2^1157520 is an apocalyptic number.

1157520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249856).

1157520 is an abundant number, since it is smaller than the sum of its proper divisors (3342192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1157520 is a wasteful number, since it uses less digits than its factorization.

1157520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 1157520 is about 1075.8810343156. The cubic root of 1157520 is about 104.9968253008.

Subtracting from 1157520 its reverse (257511), we obtain a palindrome (900009).

The spelling of 1157520 in words is "one million, one hundred fifty-seven thousand, five hundred twenty".