42140957 has 2 divisors, whose sum is σ = 42140958. Its totient is φ = 42140956.

The previous prime is 42140953. The next prime is 42141017. The reversal of 42140957 is 75904124.

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., 28847641 + 13293316 = 5371^2 + 3646^2 .

It is a cyclic number.

It is not a de Polignac number, because 42140957 - 2² = 42140953 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 (42140953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21070478 + 21070479.

It is an arithmetic number, because the mean of its divisors is an integer number (21070479).

Almost surely, 2^42140957 is an apocalyptic number.

It is an amenable number.

42140957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42140957 is an equidigital number, since it uses as much as digits as its factorization.

42140957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 42140957 is about 6491.6066578313. The cubic root of 42140957 is about 347.9910955796.

The spelling of 42140957 in words is "forty-two million, one hundred forty thousand, nine hundred fifty-seven".