155674921 has 8 divisors (see below), whose sum is σ = 160846400. Its totient is φ = 150574032.

The previous prime is 155674919. The next prime is 155674931. The reversal of 155674921 is 129476551.

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

It is a cyclic number.

It is not a de Polignac number, because 155674921 - 2¹ = 155674919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155674931) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13146 + ... + 22003.

It is an arithmetic number, because the mean of its divisors is an integer number (20105800).

Almost surely, 2^155674921 is an apocalyptic number.

It is an amenable number.

155674921 is a deficient number, since it is larger than the sum of its proper divisors (5171479).

155674921 is a wasteful number, since it uses less digits than its factorization.

155674921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35295.

The product of its digits is 75600, while the sum is 40.

The square root of 155674921 is about 12476.9756351449. The cubic root of 155674921 is about 537.9470760947.

The spelling of 155674921 in words is "one hundred fifty-five million, six hundred seventy-four thousand, nine hundred twenty-one".