1157421340 has 24 divisors (see below), whose sum is σ = 2431370592. Its totient is φ = 462818880.

The previous prime is 1157421311. The next prime is 1157421373. The reversal of 1157421340 is 431247511.

It is a junction number, because it is equal to n+sod(n) for n = 1157421299 and 1157421308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70822 + ... + 85618.

It is an arithmetic number, because the mean of its divisors is an integer number (101307108).

Almost surely, 2^1157421340 is an apocalyptic number.

1157421340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157421340 is an abundant number, since it is smaller than the sum of its proper divisors (1273949252).

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

1157421340 is a wasteful number, since it uses less digits than its factorization.

1157421340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18717 (or 18715 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1157421340 is about 34020.8956378282. The cubic root of 1157421340 is about 1049.9384211808.

Adding to 1157421340 its reverse (431247511), we get a palindrome (1588668851).

The spelling of 1157421340 in words is "one billion, one hundred fifty-seven million, four hundred twenty-one thousand, three hundred forty".