142131397 has 2 divisors, whose sum is σ = 142131398. Its totient is φ = 142131396.

The previous prime is 142131347. The next prime is 142131427. The reversal of 142131397 is 793131241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115906756 + 26224641 = 10766^2 + 5121^2 .

It is a cyclic number.

It is not a de Polignac number, because 142131397 - 2¹¹ = 142129349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142131347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71065698 + 71065699.

It is an arithmetic number, because the mean of its divisors is an integer number (71065699).

Almost surely, 2^142131397 is an apocalyptic number.

It is an amenable number.

142131397 is a deficient number, since it is larger than the sum of its proper divisors (1).

142131397 is an equidigital number, since it uses as much as digits as its factorization.

142131397 is an odious number, because the sum of its binary digits is odd.

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

The square root of 142131397 is about 11921.8873086437. The cubic root of 142131397 is about 521.8712132681.

The spelling of 142131397 in words is "one hundred forty-two million, one hundred thirty-one thousand, three hundred ninety-seven".