152501021 has 2 divisors, whose sum is σ = 152501022. Its totient is φ = 152501020.

The previous prime is 152501009. The next prime is 152501029. The reversal of 152501021 is 120105251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144264121 + 8236900 = 12011^2 + 2870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152501021 is a prime.

It is a super-2 number, since 2×152501021² = 46513122812084882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152501029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76250510 + 76250511.

It is an arithmetic number, because the mean of its divisors is an integer number (76250511).

Almost surely, 2^152501021 is an apocalyptic number.

It is an amenable number.

152501021 is a deficient number, since it is larger than the sum of its proper divisors (1).

152501021 is an equidigital number, since it uses as much as digits as its factorization.

152501021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 152501021 is about 12349.1303742409. The cubic root of 152501021 is about 534.2660573875.

Adding to 152501021 its reverse (120105251), we get a palindrome (272606272).

The spelling of 152501021 in words is "one hundred fifty-two million, five hundred one thousand, twenty-one".