155421296 has 20 divisors (see below), whose sum is σ = 302088552. Its totient is φ = 77462976.

The previous prime is 155421289. The next prime is 155421319. The reversal of 155421296 is 692124551.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10250 + ... + 20393.

Almost surely, 2^155421296 is an apocalyptic number.

155421296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

155421296 is a deficient number, since it is larger than the sum of its proper divisors (146667256).

155421296 is a wasteful number, since it uses less digits than its factorization.

155421296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30968 (or 30962 counting only the distinct ones).

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

The square root of 155421296 is about 12466.8077710375. The cubic root of 155421296 is about 537.6547768436.

The spelling of 155421296 in words is "one hundred fifty-five million, four hundred twenty-one thousand, two hundred ninety-six".