152012421 has 18 divisors (see below), whose sum is σ = 241351110. Its totient is φ = 92128080.

The previous prime is 152012417. The next prime is 152012449. The reversal of 152012421 is 124210251.

152012421 is a `hidden beast` number, since 1 + 520 + 124 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 146676321 + 5336100 = 12111^2 + 2310^2 .

It is not a de Polignac number, because 152012421 - 2² = 152012417 is a prime.

It is a super-2 number, since 2×152012421² = 46215552276562482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 152012394 and 152012403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152012411) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 68706 + ... + 70883.

It is an arithmetic number, because the mean of its divisors is an integer number (13408395).

Almost surely, 2^152012421 is an apocalyptic number.

152012421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

152012421 is a deficient number, since it is larger than the sum of its proper divisors (89338689).

152012421 is a wasteful number, since it uses less digits than its factorization.

152012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139617 (or 139603 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 152012421 is about 12329.3317337153. The cubic root of 152012421 is about 533.6948662857.

Adding to 152012421 its reverse (124210251), we get a palindrome (276222672).

The spelling of 152012421 in words is "one hundred fifty-two million, twelve thousand, four hundred twenty-one".