155120424 has 32 divisors (see below), whose sum is σ = 388677120. Its totient is φ = 51590016.

The previous prime is 155120423. The next prime is 155120429. The reversal of 155120424 is 424021551.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 155120394 and 155120403.

It is not an unprimeable number, because it can be changed into a prime (155120423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3897 + ... + 18039.

It is an arithmetic number, because the mean of its divisors is an integer number (12146160).

Almost surely, 2^155120424 is an apocalyptic number.

It is an amenable number.

155120424 is an abundant number, since it is smaller than the sum of its proper divisors (233556696).

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

155120424 is a wasteful number, since it uses less digits than its factorization.

155120424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14609 (or 14605 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 155120424 is about 12454.7350032026. The cubic root of 155120424 is about 537.3076134263.

Adding to 155120424 its reverse (424021551), we get a palindrome (579141975).

The spelling of 155120424 in words is "one hundred fifty-five million, one hundred twenty thousand, four hundred twenty-four".