42498139 has 2 divisors, whose sum is σ = 42498140. Its totient is φ = 42498138.

The previous prime is 42498133. The next prime is 42498187. The reversal of 42498139 is 93189424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42498139 - 2⁵ = 42498107 is a prime.

It is not a weakly prime, because it can be changed into another prime (42498133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21249069 + 21249070.

It is an arithmetic number, because the mean of its divisors is an integer number (21249070).

Almost surely, 2^42498139 is an apocalyptic number.

42498139 is a deficient number, since it is larger than the sum of its proper divisors (1).

42498139 is an equidigital number, since it uses as much as digits as its factorization.

42498139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 42498139 is about 6519.0596714557. The cubic root of 42498139 is about 348.9715085812.

The spelling of 42498139 in words is "forty-two million, four hundred ninety-eight thousand, one hundred thirty-nine".