131256250 has 24 divisors (see below), whose sum is σ = 246101436. Its totient is φ = 52500000.

The previous prime is 131256247. The next prime is 131256271. The reversal of 131256250 is 52652131.

It can be written as a sum of positive squares in 6 ways, for example, as 30835809 + 100420441 = 5553^2 + 10021^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4251 + ... + 16750.

Almost surely, 2^131256250 is an apocalyptic number.

131256250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131256250 is a deficient number, since it is larger than the sum of its proper divisors (114845186).

131256250 is an frugal number, since it uses more digits than its factorization.

131256250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21028 (or 21008 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 131256250 is about 11456.7120065052. The cubic root of 131256250 is about 508.2062449171.

The spelling of 131256250 in words is "one hundred thirty-one million, two hundred fifty-six thousand, two hundred fifty".