131242402 has 8 divisors (see below), whose sum is σ = 197136576. Its totient is φ = 65530212.

The previous prime is 131242399. The next prime is 131242409. The reversal of 131242402 is 204242131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131242402.

It is not an unprimeable number, because it can be changed into a prime (131242409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43678 + ... + 46585.

It is an arithmetic number, because the mean of its divisors is an integer number (24642072).

Almost surely, 2^131242402 is an apocalyptic number.

131242402 is a deficient number, since it is larger than the sum of its proper divisors (65894174).

131242402 is an equidigital number, since it uses as much as digits as its factorization.

131242402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90992.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 131242402 is about 11456.1076286844. The cubic root of 131242402 is about 508.1883717680.

Adding to 131242402 its reverse (204242131), we get a palindrome (335484533).

The spelling of 131242402 in words is "one hundred thirty-one million, two hundred forty-two thousand, four hundred two".