131987401 has 16 divisors (see below), whose sum is σ = 162717184. Its totient is φ = 104255424.

The previous prime is 131987351. The next prime is 131987407. The reversal of 131987401 is 104789131.

It is not a de Polignac number, because 131987401 - 2¹³ = 131979209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131987407) 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, 98800 + ... + 100126.

It is an arithmetic number, because the mean of its divisors is an integer number (10169824).

Almost surely, 2^131987401 is an apocalyptic number.

It is an amenable number.

131987401 is a deficient number, since it is larger than the sum of its proper divisors (30729783).

131987401 is a wasteful number, since it uses less digits than its factorization.

131987401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 131987401 is about 11488.5769788952. The cubic root of 131987401 is about 509.1481370528.

The spelling of 131987401 in words is "one hundred thirty-one million, nine hundred eighty-seven thousand, four hundred one".