131401602 has 40 divisors (see below), whose sum is σ = 311763276. Its totient is φ = 41223168.

The previous prime is 131401601. The next prime is 131401607. The reversal of 131401602 is 206104131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 130439241 + 962361 = 11421^2 + 981^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131401601) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 21103 + ... + 26610.

Almost surely, 2^131401602 is an apocalyptic number.

131401602 is an abundant number, since it is smaller than the sum of its proper divisors (180361674).

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

131401602 is a wasteful number, since it uses less digits than its factorization.

131401602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47744 (or 47735 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 131401602 is about 11463.0537816064. The cubic root of 131401602 is about 508.3937700665.

Adding to 131401602 its reverse (206104131), we get a palindrome (337505733).

The spelling of 131401602 in words is "one hundred thirty-one million, four hundred one thousand, six hundred two".