1157320 has 16 divisors (see below), whose sum is σ = 2604060. Its totient is φ = 462912.

The previous prime is 1157293. The next prime is 1157327. The reversal of 1157320 is 237511.

It can be written as a sum of positive squares in 2 ways, for example, as 1153476 + 3844 = 1074^2 + 62^2 .

It is not an unprimeable number, because it can be changed into a prime (1157327) 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, 14427 + ... + 14506.

2^1157320 is an apocalyptic number.

1157320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157320 is an abundant number, since it is smaller than the sum of its proper divisors (1446740).

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

1157320 is a wasteful number, since it uses less digits than its factorization.

1157320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28944 (or 28940 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1157320 is about 1075.7880832209. The cubic root of 1157320 is about 104.9907777237.

The spelling of 1157320 in words is "one million, one hundred fifty-seven thousand, three hundred twenty".