131504121 has 48 divisors (see below), whose sum is σ = 227598720. Its totient is φ = 73504800.

The previous prime is 131504099. The next prime is 131504159. The reversal of 131504121 is 121405131.

It is not a de Polignac number, because 131504121 - 2⁶ = 131504057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131504094 and 131504103.

It is not an unprimeable number, because it can be changed into a prime (131504221) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1301971 + ... + 1302071.

It is an arithmetic number, because the mean of its divisors is an integer number (4741640).

Almost surely, 2^131504121 is an apocalyptic number.

It is an amenable number.

131504121 is a deficient number, since it is larger than the sum of its proper divisors (96094599).

131504121 is an equidigital number, since it uses as much as digits as its factorization.

131504121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 131504121 is about 11467.5246239108. The cubic root of 131504121 is about 508.5259512865.

Adding to 131504121 its reverse (121405131), we get a palindrome (252909252).

It can be divided in two parts, 13150 and 4121, that added together give a palindrome (17271).

The spelling of 131504121 in words is "one hundred thirty-one million, five hundred four thousand, one hundred twenty-one".