155406925 has 6 divisors (see below), whose sum is σ = 192704618. Its totient is φ = 124325520.

The previous prime is 155406913. The next prime is 155406931. The reversal of 155406925 is 529604551.

It can be written as a sum of positive squares in 3 ways, for example, as 1572516 + 153834409 = 1254^2 + 12403^2 .

It is not a de Polignac number, because 155406925 - 2⁵ = 155406893 is a prime.

It is a Duffinian number.

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, 3108114 + ... + 3108163.

Almost surely, 2^155406925 is an apocalyptic number.

It is an amenable number.

155406925 is a deficient number, since it is larger than the sum of its proper divisors (37297693).

155406925 is an equidigital number, since it uses as much as digits as its factorization.

155406925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216287 (or 6216282 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 155406925 is about 12466.2313872317. The cubic root of 155406925 is about 537.6382049513.

The spelling of 155406925 in words is "one hundred fifty-five million, four hundred six thousand, nine hundred twenty-five".