131225785 has 4 divisors (see below), whose sum is σ = 157470948. Its totient is φ = 104980624.

The previous prime is 131225777. The next prime is 131225803. The reversal of 131225785 is 587522131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13307904 + 117917881 = 3648^2 + 10859^2 .

It is a cyclic number.

It is not a de Polignac number, because 131225785 - 2³ = 131225777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131225785.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13122574 + ... + 13122583.

It is an arithmetic number, because the mean of its divisors is an integer number (39367737).

Almost surely, 2^131225785 is an apocalyptic number.

It is an amenable number.

131225785 is a deficient number, since it is larger than the sum of its proper divisors (26245163).

131225785 is an equidigital number, since it uses as much as digits as its factorization.

131225785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26245162.

The product of its digits is 16800, while the sum is 34.

The square root of 131225785 is about 11455.3823593977. The cubic root of 131225785 is about 508.1669231039.

The spelling of 131225785 in words is "one hundred thirty-one million, two hundred twenty-five thousand, seven hundred eighty-five".