142615961 has 2 divisors, whose sum is σ = 142615962. Its totient is φ = 142615960.

The previous prime is 142615931. The next prime is 142615969. The reversal of 142615961 is 169516241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99121936 + 43494025 = 9956^2 + 6595^2 .

It is an emirp because it is prime and its reverse (169516241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142615961 - 2⁶ = 142615897 is a prime.

It is not a weakly prime, because it can be changed into another prime (142615969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71307980 + 71307981.

It is an arithmetic number, because the mean of its divisors is an integer number (71307981).

Almost surely, 2^142615961 is an apocalyptic number.

It is an amenable number.

142615961 is a deficient number, since it is larger than the sum of its proper divisors (1).

142615961 is an equidigital number, since it uses as much as digits as its factorization.

142615961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 142615961 is about 11942.1924703967. The cubic root of 142615961 is about 522.4636068148.

The spelling of 142615961 in words is "one hundred forty-two million, six hundred fifteen thousand, nine hundred sixty-one".