131421700 has 18 divisors (see below), whose sum is σ = 285185306. Its totient is φ = 52568640.

The previous prime is 131421691. The next prime is 131421751. The reversal of 131421700 is 7124131.

It can be written as a sum of positive squares in 3 ways, for example, as 3415104 + 128006596 = 1848^2 + 11314^2 .

It is a super-5 number, since 5×131421700⁵ (a number of 42 digits) contains 55555 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 657009 + ... + 657208.

Almost surely, 2^131421700 is an apocalyptic number.

131421700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131421700 is an abundant number, since it is smaller than the sum of its proper divisors (153763606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131421700 is a wasteful number, since it uses less digits than its factorization.

131421700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314231 (or 1314224 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 131421700 is about 11463.9303905772. The cubic root of 131421700 is about 508.4196885154.

Adding to 131421700 its reverse (7124131), we get a palindrome (138545831).

The spelling of 131421700 in words is "one hundred thirty-one million, four hundred twenty-one thousand, seven hundred".