42380957 has 2 divisors, whose sum is σ = 42380958. Its totient is φ = 42380956.

The previous prime is 42380837. The next prime is 42380959. The reversal of 42380957 is 75908324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 2172676 = 6341^2 + 1474^2 .

It is a cyclic number.

It is not a de Polignac number, because 42380957 - 2¹⁴ = 42364573 is a prime.

It is a super-2 number, since 2×42380957² = 3592291032471698, which contains 22 as substring.

Together with 42380959, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42380957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42380959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21190478 + 21190479.

It is an arithmetic number, because the mean of its divisors is an integer number (21190479).

Almost surely, 2^42380957 is an apocalyptic number.

It is an amenable number.

42380957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42380957 is an equidigital number, since it uses as much as digits as its factorization.

42380957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 42380957 is about 6510.0658214798. The cubic root of 42380957 is about 348.6504684644.

The spelling of 42380957 in words is "forty-two million, three hundred eighty thousand, nine hundred fifty-seven".