155421412 has 48 divisors (see below), whose sum is σ = 296699760. Its totient is φ = 70963200.

The previous prime is 155421407. The next prime is 155421439. The reversal of 155421412 is 214124551.

It can be written as a sum of positive squares in 8 ways, for example, as 61214976 + 94206436 = 7824^2 + 9706^2 .

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, 368962 + ... + 369382.

It is an arithmetic number, because the mean of its divisors is an integer number (6181245).

Almost surely, 2^155421412 is an apocalyptic number.

It is an amenable number.

155421412 is a deficient number, since it is larger than the sum of its proper divisors (141278348).

155421412 is a wasteful number, since it uses less digits than its factorization.

155421412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592 (or 590 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 155421412 is about 12466.8124233904. The cubic root of 155421412 is about 537.6549106047.

Adding to 155421412 its reverse (214124551), we get a palindrome (369545963).

The spelling of 155421412 in words is "one hundred fifty-five million, four hundred twenty-one thousand, four hundred twelve".