42420497 has 4 divisors (see below), whose sum is σ = 48480576. Its totient is φ = 36360420.

The previous prime is 42420481. The next prime is 42420503. The reversal of 42420497 is 79402424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42420497 - 2⁴ = 42420481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42420467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030029 + ... + 3030042.

It is an arithmetic number, because the mean of its divisors is an integer number (12120144).

Almost surely, 2^42420497 is an apocalyptic number.

It is an amenable number.

42420497 is a deficient number, since it is larger than the sum of its proper divisors (6060079).

42420497 is an equidigital number, since it uses as much as digits as its factorization.

42420497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060078.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 42420497 is about 6513.1019491483. The cubic root of 42420497 is about 348.7588611290.

The spelling of 42420497 in words is "forty-two million, four hundred twenty thousand, four hundred ninety-seven".