42453139 has 2 divisors, whose sum is σ = 42453140. Its totient is φ = 42453138.

The previous prime is 42453137. The next prime is 42453157. The reversal of 42453139 is 93135424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42453139 - 2¹ = 42453137 is a prime.

Together with 42453137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 42453139.

It is not a weakly prime, because it can be changed into another prime (42453137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21226569 + 21226570.

It is an arithmetic number, because the mean of its divisors is an integer number (21226570).

Almost surely, 2^42453139 is an apocalyptic number.

42453139 is a deficient number, since it is larger than the sum of its proper divisors (1).

42453139 is an equidigital number, since it uses as much as digits as its factorization.

42453139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 42453139 is about 6515.6073393046. The cubic root of 42453139 is about 348.8482932731.

The spelling of 42453139 in words is "forty-two million, four hundred fifty-three thousand, one hundred thirty-nine".