131142021 has 8 divisors (see below), whose sum is σ = 182458560. Its totient is φ = 83626752.

The previous prime is 131142019. The next prime is 131142043. The reversal of 131142021 is 120241131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131142021 - 2¹ = 131142019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131142001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950236 + ... + 950373.

It is an arithmetic number, because the mean of its divisors is an integer number (22807320).

Almost surely, 2^131142021 is an apocalyptic number.

It is an amenable number.

131142021 is a deficient number, since it is larger than the sum of its proper divisors (51316539).

131142021 is a wasteful number, since it uses less digits than its factorization.

131142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900635.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 131142021 is about 11451.7256778182. The cubic root of 131142021 is about 508.0587757753.

Adding to 131142021 its reverse (120241131), we get a palindrome (251383152).

The spelling of 131142021 in words is "one hundred thirty-one million, one hundred forty-two thousand, twenty-one".