155121426 has 32 divisors (see below), whose sum is σ = 345744000. Its totient is φ = 51552720.

The previous prime is 155121403. The next prime is 155121433. The reversal of 155121426 is 624121551.

155121426 is a `hidden beast` number, since 1 + 5 + 512 + 142 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155121426.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14731 + ... + 22961.

It is an arithmetic number, because the mean of its divisors is an integer number (10804500).

Almost surely, 2^155121426 is an apocalyptic number.

155121426 is an abundant number, since it is smaller than the sum of its proper divisors (190622574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155121426 is a wasteful number, since it uses less digits than its factorization.

155121426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8591 (or 8585 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 155121426 is about 12454.7752288028. The cubic root of 155121426 is about 537.3087703362.

Adding to 155121426 its reverse (624121551), we get a palindrome (779242977).

The spelling of 155121426 in words is "one hundred fifty-five million, one hundred twenty-one thousand, four hundred twenty-six".