155424725 has 6 divisors (see below), whose sum is σ = 192726690. Its totient is φ = 124339760.

The previous prime is 155424713. The next prime is 155424739. The reversal of 155424725 is 527424551.

It can be written as a sum of positive squares in 3 ways, for example, as 21003889 + 134420836 = 4583^2 + 11594^2 .

It is not a de Polignac number, because 155424725 - 2¹⁰ = 155423701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3108470 + ... + 3108519.

It is an arithmetic number, because the mean of its divisors is an integer number (32121115).

Almost surely, 2^155424725 is an apocalyptic number.

It is an amenable number.

155424725 is a deficient number, since it is larger than the sum of its proper divisors (37301965).

155424725 is an equidigital number, since it uses as much as digits as its factorization.

155424725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216999 (or 6216994 counting only the distinct ones).

The product of its digits is 56000, while the sum is 35.

The square root of 155424725 is about 12466.9452954603. The cubic root of 155424725 is about 537.6587308378.

The spelling of 155424725 in words is "one hundred fifty-five million, four hundred twenty-four thousand, seven hundred twenty-five".