155021124 has 24 divisors (see below), whose sum is σ = 374189760. Its totient is φ = 49891744.

The previous prime is 155021107. The next prime is 155021159. The reversal of 155021124 is 421120551.

It is a self number, because there is not a number n which added to its sum of digits gives 155021124.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222384 + ... + 223079.

It is an arithmetic number, because the mean of its divisors is an integer number (15591240).

Almost surely, 2^155021124 is an apocalyptic number.

It is an amenable number.

155021124 is an abundant number, since it is smaller than the sum of its proper divisors (219168636).

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

155021124 is a wasteful number, since it uses less digits than its factorization.

155021124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445499 (or 445497 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 155021124 is about 12450.7479293414. The cubic root of 155021124 is about 537.1929368551.

Adding to 155021124 its reverse (421120551), we get a palindrome (576141675).

The spelling of 155021124 in words is "one hundred fifty-five million, twenty-one thousand, one hundred twenty-four".