155421704 has 16 divisors (see below), whose sum is σ = 292285500. Its totient is φ = 77478912.

The previous prime is 155421661. The next prime is 155421713. The reversal of 155421704 is 407124551.

It can be written as a sum of positive squares in 2 ways, for example, as 146361604 + 9060100 = 12098^2 + 3010^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26129 + ... + 31520.

Almost surely, 2^155421704 is an apocalyptic number.

It is an amenable number.

155421704 is a deficient number, since it is larger than the sum of its proper divisors (136863796).

155421704 is a wasteful number, since it uses less digits than its factorization.

155421704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57992 (or 57988 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 155421704 is about 12466.8241344779. The cubic root of 155421704 is about 537.6552473132.

The spelling of 155421704 in words is "one hundred fifty-five million, four hundred twenty-one thousand, seven hundred four".