142371391 has 2 divisors, whose sum is σ = 142371392. Its totient is φ = 142371390.

The previous prime is 142371373. The next prime is 142371419. The reversal of 142371391 is 193173241.

It is a weak prime.

It is an emirp because it is prime and its reverse (193173241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142371391 - 2⁷ = 142371263 is a prime.

It is a super-2 number, since 2×142371391² = 40539225950549762, which contains 22 as substring.

It is equal to p_8038552 and since 142371391 and 8038552 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142371791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71185695 + 71185696.

It is an arithmetic number, because the mean of its divisors is an integer number (71185696).

Almost surely, 2^142371391 is an apocalyptic number.

142371391 is a deficient number, since it is larger than the sum of its proper divisors (1).

142371391 is an equidigital number, since it uses as much as digits as its factorization.

142371391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 31.

The square root of 142371391 is about 11931.9483321040. The cubic root of 142371391 is about 522.1647808976.

The spelling of 142371391 in words is "one hundred forty-two million, three hundred seventy-one thousand, three hundred ninety-one".