131278730 has 16 divisors (see below), whose sum is σ = 257783904. Its totient is φ = 47737680.

The previous prime is 131278729. The next prime is 131278781. The reversal of 131278730 is 37872131.

It is a Curzon 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, 596612 + ... + 596831.

It is an arithmetic number, because the mean of its divisors is an integer number (16111494).

Almost surely, 2^131278730 is an apocalyptic number.

131278730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131278730 is a deficient number, since it is larger than the sum of its proper divisors (126505174).

131278730 is a wasteful number, since it uses less digits than its factorization.

131278730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193461.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 131278730 is about 11457.6930487773. The cubic root of 131278730 is about 508.2352564226.

The spelling of 131278730 in words is "one hundred thirty-one million, two hundred seventy-eight thousand, seven hundred thirty".