131405025 has 24 divisors (see below), whose sum is σ = 220325184. Its totient is φ = 69092800.

The previous prime is 131404993. The next prime is 131405047. The reversal of 131405025 is 520504131.

It is not a de Polignac number, because 131405025 - 2⁵ = 131404993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131404992 and 131405010.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7014 + ... + 17663.

It is an arithmetic number, because the mean of its divisors is an integer number (9180216).

Almost surely, 2^131405025 is an apocalyptic number.

131405025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131405025 is a deficient number, since it is larger than the sum of its proper divisors (88920159).

131405025 is a wasteful number, since it uses less digits than its factorization.

131405025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24761 (or 24756 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 131405025 is about 11463.2030863978. The cubic root of 131405025 is about 508.3981845656.

Adding to 131405025 its reverse (520504131), we get a palindrome (651909156).

The spelling of 131405025 in words is "one hundred thirty-one million, four hundred five thousand, twenty-five".