131206412 has 6 divisors (see below), whose sum is σ = 229611228. Its totient is φ = 65603204.

The previous prime is 131206399. The next prime is 131206417. The reversal of 131206412 is 214602131.

It is not an unprimeable number, because it can be changed into a prime (131206417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16400798 + ... + 16400805.

It is an arithmetic number, because the mean of its divisors is an integer number (38268538).

Almost surely, 2^131206412 is an apocalyptic number.

It is an amenable number.

131206412 is a deficient number, since it is larger than the sum of its proper divisors (98404816).

131206412 is a wasteful number, since it uses less digits than its factorization.

131206412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32801607 (or 32801605 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 131206412 is about 11454.5367431424. The cubic root of 131206412 is about 508.1419148016.

Adding to 131206412 its reverse (214602131), we get a palindrome (345808543).

The spelling of 131206412 in words is "one hundred thirty-one million, two hundred six thousand, four hundred twelve".