1271972590 has 32 divisors (see below), whose sum is σ = 2618164224. Its totient is φ = 435849120.

The previous prime is 1271972539. The next prime is 1271972591. The reversal of 1271972590 is 952791721.

It is a super-2 number, since 2×1271972590² = 3235828539422616200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271972591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144907 + ... + 153433.

It is an arithmetic number, because the mean of its divisors is an integer number (81817632).

Almost surely, 2^1271972590 is an apocalyptic number.

1271972590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1271972590 is an abundant number, since it is smaller than the sum of its proper divisors (1346191634).

1271972590 is a wasteful number, since it uses less digits than its factorization.

1271972590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672.

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 1271972590 is about 35664.7247290653. The cubic root of 1271972590 is about 1083.4925202500.

The spelling of 1271972590 in words is "one billion, two hundred seventy-one million, nine hundred seventy-two thousand, five hundred ninety".