155451025 has 12 divisors (see below), whose sum is σ = 193566604. Its totient is φ = 123840000.

The previous prime is 155451001. The next prime is 155451029. The reversal of 155451025 is 520154551.

It is a Cunningham number, because it is equal to 12468²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 155451024 = 1^2 + 12468^2 .

It is not a de Polignac number, because 155451025 - 2⁵ = 155450993 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155450984 and 155451002.

It is not an unprimeable number, because it can be changed into a prime (155451029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6876 + ... + 18925.

Almost surely, 2^155451025 is an apocalyptic number.

It is an amenable number.

155451025 is a deficient number, since it is larger than the sum of its proper divisors (38115579).

155451025 is a wasteful number, since it uses less digits than its factorization.

155451025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26052 (or 26047 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 155451025 is about 12468.0000401027. Note that the first 4 decimals coincide. The cubic root of 155451025 is about 537.6890555434.

The spelling of 155451025 in words is "one hundred fifty-five million, four hundred fifty-one thousand, twenty-five".