131004145 has 16 divisors (see below), whose sum is σ = 165767040. Its totient is φ = 99114624.

The previous prime is 131004089. The next prime is 131004191. The reversal of 131004145 is 541400131.

It is a cyclic number.

It is not a de Polignac number, because 131004145 - 2⁹ = 131003633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89812 + ... + 91258.

It is an arithmetic number, because the mean of its divisors is an integer number (10360440).

Almost surely, 2^131004145 is an apocalyptic number.

It is an amenable number.

131004145 is a deficient number, since it is larger than the sum of its proper divisors (34762895).

131004145 is a wasteful number, since it uses less digits than its factorization.

131004145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 131004145 is about 11445.7042159930. The cubic root of 131004145 is about 507.8806643551.

Adding to 131004145 its reverse (541400131), we get a palindrome (672404276).

The spelling of 131004145 in words is "one hundred thirty-one million, four thousand, one hundred forty-five".