142837381 has 2 divisors, whose sum is σ = 142837382. Its totient is φ = 142837380.

The previous prime is 142837319. The next prime is 142837391. The reversal of 142837381 is 183738241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 3006756 = 11825^2 + 1734^2 .

It is an emirp because it is prime and its reverse (183738241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142837381 - 2²³ = 134448773 is a prime.

It is a super-2 number, since 2×142837381² = 40805034821878322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142837381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142837391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71418690 + 71418691.

It is an arithmetic number, because the mean of its divisors is an integer number (71418691).

Almost surely, 2^142837381 is an apocalyptic number.

It is an amenable number.

142837381 is a deficient number, since it is larger than the sum of its proper divisors (1).

142837381 is an equidigital number, since it uses as much as digits as its factorization.

142837381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 142837381 is about 11951.4593669560. The cubic root of 142837381 is about 522.7338525709.

It can be divided in two parts, 1428 and 37381, that added together give a square (38809 = 197²).

The spelling of 142837381 in words is "one hundred forty-two million, eight hundred thirty-seven thousand, three hundred eighty-one".