152543421 has 6 divisors (see below), whose sum is σ = 220340510. Its totient is φ = 101695608.

The previous prime is 152543407. The next prime is 152543437. The reversal of 152543421 is 124345251.

152543421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 88623396 + 63920025 = 9414^2 + 7995^2 .

It is not a de Polignac number, because 152543421 - 2¹⁵ = 152510653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152543471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8474626 + ... + 8474643.

Almost surely, 2^152543421 is an apocalyptic number.

It is an amenable number.

152543421 is a deficient number, since it is larger than the sum of its proper divisors (67797089).

152543421 is a wasteful number, since it uses less digits than its factorization.

152543421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16949275 (or 16949272 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 152543421 is about 12350.8469750054. The cubic root of 152543421 is about 534.3155669615.

Adding to 152543421 its reverse (124345251), we get a palindrome (276888672).

The spelling of 152543421 in words is "one hundred fifty-two million, five hundred forty-three thousand, four hundred twenty-one".