155405254 has 8 divisors (see below), whose sum is σ = 239408208. Its totient is φ = 75602520.

The previous prime is 155405249. The next prime is 155405309. The reversal of 155405254 is 452504551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1049962 + ... + 1050109.

It is an arithmetic number, because the mean of its divisors is an integer number (29926026).

Almost surely, 2^155405254 is an apocalyptic number.

155405254 is a deficient number, since it is larger than the sum of its proper divisors (84002954).

155405254 is a wasteful number, since it uses less digits than its factorization.

155405254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100110.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 155405254 is about 12466.1643659949. The cubic root of 155405254 is about 537.6362779744.

The spelling of 155405254 in words is "one hundred fifty-five million, four hundred five thousand, two hundred fifty-four".