1157440 has 28 divisors (see below), whose sum is σ = 2756916. Its totient is φ = 462848.

The previous prime is 1157437. The next prime is 1157449. The reversal of 1157440 is 447511.

It can be written as a sum of positive squares in 2 ways, for example, as 141376 + 1016064 = 376^2 + 1008^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489 + ... + 2128.

2^1157440 is an apocalyptic number.

1157440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157440 is an abundant number, since it is smaller than the sum of its proper divisors (1599476).

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

1157440 is an equidigital number, since it uses as much as digits as its factorization.

1157440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634 (or 3624 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 1157440 is about 1075.8438548414. The cubic root of 1157440 is about 104.9944063536.

The spelling of 1157440 in words is "one million, one hundred fifty-seven thousand, four hundred forty".