1157421506 has 32 divisors (see below), whose sum is σ = 1863388800. Its totient is φ = 537267456.

The previous prime is 1157421439. The next prime is 1157421511. The reversal of 1157421506 is 6051247511.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221725 + ... + 1222671.

It is an arithmetic number, because the mean of its divisors is an integer number (58230900).

Almost surely, 2^1157421506 is an apocalyptic number.

1157421506 is a deficient number, since it is larger than the sum of its proper divisors (705967294).

1157421506 is a wasteful number, since it uses less digits than its factorization.

1157421506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 1157421506 is about 34020.8980775052. The cubic root of 1157421506 is about 1049.9384713757.

The spelling of 1157421506 in words is "one billion, one hundred fifty-seven million, four hundred twenty-one thousand, five hundred six".