152542391 has 2 divisors, whose sum is σ = 152542392. Its totient is φ = 152542390.

The previous prime is 152542387. The next prime is 152542447. The reversal of 152542391 is 193245251.

It is a weak prime.

It is an emirp because it is prime and its reverse (193245251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 152542391 - 2² = 152542387 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152542361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76271195 + 76271196.

It is an arithmetic number, because the mean of its divisors is an integer number (76271196).

Almost surely, 2^152542391 is an apocalyptic number.

152542391 is a deficient number, since it is larger than the sum of its proper divisors (1).

152542391 is an equidigital number, since it uses as much as digits as its factorization.

152542391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 152542391 is about 12350.8052773898. The cubic root of 152542391 is about 534.3143643612.

The spelling of 152542391 in words is "one hundred fifty-two million, five hundred forty-two thousand, three hundred ninety-one".