131004242 has 4 divisors (see below), whose sum is σ = 196506366. Its totient is φ = 65502120.

The previous prime is 131004217. The next prime is 131004253. The reversal of 131004242 is 242400131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 113018161 + 17986081 = 10631^2 + 4241^2 .

It is a super-2 number, since 2×131004242² = 34324222843989128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131004242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32751059 + ... + 32751062.

Almost surely, 2^131004242 is an apocalyptic number.

131004242 is a deficient number, since it is larger than the sum of its proper divisors (65502124).

131004242 is an equidigital number, since it uses as much as digits as its factorization.

131004242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65502123.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 131004242 is about 11445.7084533899. The cubic root of 131004242 is about 507.8807897059.

Adding to 131004242 its reverse (242400131), we get a palindrome (373404373).

The spelling of 131004242 in words is "one hundred thirty-one million, four thousand, two hundred forty-two".