142504391 has 2 divisors, whose sum is σ = 142504392. Its totient is φ = 142504390.

The previous prime is 142504381. The next prime is 142504429. The reversal of 142504391 is 193405241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142504391 - 2¹⁴ = 142488007 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 (142504321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71252195 + 71252196.

It is an arithmetic number, because the mean of its divisors is an integer number (71252196).

Almost surely, 2^142504391 is an apocalyptic number.

142504391 is a deficient number, since it is larger than the sum of its proper divisors (1).

142504391 is an equidigital number, since it uses as much as digits as its factorization.

142504391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 142504391 is about 11937.5203036477. The cubic root of 142504391 is about 522.3273283052.

The spelling of 142504391 in words is "one hundred forty-two million, five hundred four thousand, three hundred ninety-one".