155121325 has 12 divisors (see below), whose sum is σ = 195612480. Its totient is φ = 121992560.

The previous prime is 155121283. The next prime is 155121341. The reversal of 155121325 is 523121551.

It is not a de Polignac number, because 155121325 - 2⁹ = 155120813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 155121325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51109 + ... + 54058.

It is an arithmetic number, because the mean of its divisors is an integer number (16301040).

Almost surely, 2^155121325 is an apocalyptic number.

It is an amenable number.

155121325 is a deficient number, since it is larger than the sum of its proper divisors (40491155).

155121325 is a wasteful number, since it uses less digits than its factorization.

155121325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105236 (or 105231 counting only the distinct ones).

The product of its digits is 1500, while the sum is 25.

The square root of 155121325 is about 12454.7711741324. The cubic root of 155121325 is about 537.3086537218.

Adding to 155121325 its reverse (523121551), we get a palindrome (678242876).

The spelling of 155121325 in words is "one hundred fifty-five million, one hundred twenty-one thousand, three hundred twenty-five".