155321125 has 8 divisors (see below), whose sum is σ = 193840920. Its totient is φ = 124256800.

The previous prime is 155321123. The next prime is 155321141. The reversal of 155321125 is 521123551.

It can be written as a sum of positive squares in 4 ways, for example, as 4743684 + 150577441 = 2178^2 + 12271^2 .

It is not a de Polignac number, because 155321125 - 2¹ = 155321123 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 155321125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155321123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621160 + ... + 621409.

It is an arithmetic number, because the mean of its divisors is an integer number (24230115).

Almost surely, 2^155321125 is an apocalyptic number.

It is an amenable number.

155321125 is a deficient number, since it is larger than the sum of its proper divisors (38519795).

155321125 is an equidigital number, since it uses as much as digits as its factorization.

155321125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242584 (or 1242574 counting only the distinct ones).

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

The square root of 155321125 is about 12462.7896154914. The cubic root of 155321125 is about 537.5392435742.

Adding to 155321125 its reverse (521123551), we get a palindrome (676444676).

The spelling of 155321125 in words is "one hundred fifty-five million, three hundred twenty-one thousand, one hundred twenty-five".