1397271490 has 16 divisors (see below), whose sum is σ = 2556320760. Its totient is φ = 549745920.

The previous prime is 1397271479. The next prime is 1397271503. The reversal of 1397271490 is 941727931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 520341721 + 876929769 = 22811^2 + 29613^2 .

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, 1144695 + ... + 1145914.

Almost surely, 2^1397271490 is an apocalyptic number.

1397271490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1397271490 is a deficient number, since it is larger than the sum of its proper divisors (1159049270).

1397271490 is a wasteful number, since it uses less digits than its factorization.

1397271490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290677.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 1397271490 is about 37380.0948366908. The cubic root of 1397271490 is about 1117.9617184951.

The spelling of 1397271490 in words is "one billion, three hundred ninety-seven million, two hundred seventy-one thousand, four hundred ninety".