131242605 has 16 divisors (see below), whose sum is σ = 226141440. Its totient is φ = 64611648.

The previous prime is 131242571. The next prime is 131242613. The reversal of 131242605 is 506242131.

It is not a de Polignac number, because 131242605 - 2⁶ = 131242541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336325 + ... + 336714.

It is an arithmetic number, because the mean of its divisors is an integer number (14133840).

Almost surely, 2^131242605 is an apocalyptic number.

131242605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131242605 is a deficient number, since it is larger than the sum of its proper divisors (94898835).

131242605 is a wasteful number, since it uses less digits than its factorization.

131242605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673060.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 131242605 is about 11456.1164885837. The cubic root of 131242605 is about 508.1886337824.

Adding to 131242605 its reverse (506242131), we get a palindrome (637484736).

The spelling of 131242605 in words is "one hundred thirty-one million, two hundred forty-two thousand, six hundred five".