131420657 has 8 divisors (see below), whose sum is σ = 133760040. Its totient is φ = 129087360.

The previous prime is 131420647. The next prime is 131420669. The reversal of 131420657 is 756024131.

It can be written as a sum of positive squares in 4 ways, for example, as 1825201 + 129595456 = 1351^2 + 11384^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 131420657 - 2⁶ = 131420593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131420647) 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, 74093 + ... + 75845.

It is an arithmetic number, because the mean of its divisors is an integer number (16720005).

Almost surely, 2^131420657 is an apocalyptic number.

It is an amenable number.

131420657 is a deficient number, since it is larger than the sum of its proper divisors (2339383).

131420657 is a wasteful number, since it uses less digits than its factorization.

131420657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 131420657 is about 11463.8848999805. The cubic root of 131420657 is about 508.4183435240.

Adding to 131420657 its reverse (756024131), we get a palindrome (887444788).

The spelling of 131420657 in words is "one hundred thirty-one million, four hundred twenty thousand, six hundred fifty-seven".