155261249 has 16 divisors (see below), whose sum is σ = 183551424. Its totient is φ = 129470400.

The previous prime is 155261233. The next prime is 155261269. The reversal of 155261249 is 942162551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 155261249 - 2⁴ = 155261233 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155261269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19979 + ... + 26639.

It is an arithmetic number, because the mean of its divisors is an integer number (11471964).

Almost surely, 2^155261249 is an apocalyptic number.

It is an amenable number.

155261249 is a deficient number, since it is larger than the sum of its proper divisors (28290175).

155261249 is a wasteful number, since it uses less digits than its factorization.

155261249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848.

The product of its digits is 21600, while the sum is 35.

The square root of 155261249 is about 12460.3871930209. The cubic root of 155261249 is about 537.4701612424.

The spelling of 155261249 in words is "one hundred fifty-five million, two hundred sixty-one thousand, two hundred forty-nine".