155925249 has 4 divisors (see below), whose sum is σ = 207900336. Its totient is φ = 103950164.

The previous prime is 155925247. The next prime is 155925251. The reversal of 155925249 is 942529551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (155925247) and next prime (155925251).

It is a cyclic number.

It is not a de Polignac number, because 155925249 - 2¹ = 155925247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155925249.

It is not an unprimeable number, because it can be changed into a prime (155925247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25987539 + ... + 25987544.

It is an arithmetic number, because the mean of its divisors is an integer number (51975084).

Almost surely, 2^155925249 is an apocalyptic number.

It is an amenable number.

155925249 is a deficient number, since it is larger than the sum of its proper divisors (51975087).

155925249 is an equidigital number, since it uses as much as digits as its factorization.

155925249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51975086.

The product of its digits is 162000, while the sum is 42.

The square root of 155925249 is about 12487.0032033311. The cubic root of 155925249 is about 538.2352644531.

The spelling of 155925249 in words is "one hundred fifty-five million, nine hundred twenty-five thousand, two hundred forty-nine".