152542021 has 2 divisors, whose sum is σ = 152542022. Its totient is φ = 152542020.

The previous prime is 152542007. The next prime is 152542031. The reversal of 152542021 is 120245251.

152542021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95765796 + 56776225 = 9786^2 + 7535^2 .

It is a cyclic number.

It is not a de Polignac number, because 152542021 - 2²³ = 144153413 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 152541983 and 152542001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152542031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76271010 + 76271011.

It is an arithmetic number, because the mean of its divisors is an integer number (76271011).

Almost surely, 2^152542021 is an apocalyptic number.

It is an amenable number.

152542021 is a deficient number, since it is larger than the sum of its proper divisors (1).

152542021 is an equidigital number, since it uses as much as digits as its factorization.

152542021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 152542021 is about 12350.7902986003. The cubic root of 152542021 is about 534.3139323579.

Adding to 152542021 its reverse (120245251), we get a palindrome (272787272).

The spelling of 152542021 in words is "one hundred fifty-two million, five hundred forty-two thousand, twenty-one".