142381949 has 2 divisors, whose sum is σ = 142381950. Its totient is φ = 142381948.

The previous prime is 142381931. The next prime is 142381973. The reversal of 142381949 is 949183241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137124100 + 5257849 = 11710^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 142381949 - 2⁸ = 142381693 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 (142381979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71190974 + 71190975.

It is an arithmetic number, because the mean of its divisors is an integer number (71190975).

Almost surely, 2^142381949 is an apocalyptic number.

It is an amenable number.

142381949 is a deficient number, since it is larger than the sum of its proper divisors (1).

142381949 is an equidigital number, since it uses as much as digits as its factorization.

142381949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 142381949 is about 11932.3907495522. The cubic root of 142381949 is about 522.1776881712.

The spelling of 142381949 in words is "one hundred forty-two million, three hundred eighty-one thousand, nine hundred forty-nine".