142345561 has 2 divisors, whose sum is σ = 142345562. Its totient is φ = 142345560.

The previous prime is 142345531. The next prime is 142345627. The reversal of 142345561 is 165543241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124545600 + 17799961 = 11160^2 + 4219^2 .

It is a cyclic number.

It is not a de Polignac number, because 142345561 - 2⁵ = 142345529 is a prime.

It is not a weakly prime, because it can be changed into another prime (142345501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71172780 + 71172781.

It is an arithmetic number, because the mean of its divisors is an integer number (71172781).

Almost surely, 2^142345561 is an apocalyptic number.

It is an amenable number.

142345561 is a deficient number, since it is larger than the sum of its proper divisors (1).

142345561 is an equidigital number, since it uses as much as digits as its factorization.

142345561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

The square root of 142345561 is about 11930.8658948125. The cubic root of 142345561 is about 522.1332007420.

The spelling of 142345561 in words is "one hundred forty-two million, three hundred forty-five thousand, five hundred sixty-one".