1157240 has 32 divisors (see below), whose sum is σ = 2976480. Its totient is φ = 396672.

The previous prime is 1157237. The next prime is 1157243. The reversal of 1157240 is 427511.

It is an interprime number because it is at equal distance from previous prime (1157237) and next prime (1157243).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1787 + ... + 2346.

It is an arithmetic number, because the mean of its divisors is an integer number (93015).

2^1157240 is an apocalyptic number.

1157240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157240 is an abundant number, since it is smaller than the sum of its proper divisors (1819240).

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

1157240 is a wasteful number, since it uses less digits than its factorization.

1157240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151 (or 4147 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1157240 is about 1075.7509005341. The cubic root of 1157240 is about 104.9883584977.

The spelling of 1157240 in words is "one million, one hundred fifty-seven thousand, two hundred forty".