42906451 has 4 divisors (see below), whose sum is σ = 49035952. Its totient is φ = 36776952.

The previous prime is 42906443. The next prime is 42906463. The reversal of 42906451 is 15460924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42906451 - 2³ = 42906443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42906491) 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, 3064740 + ... + 3064753.

It is an arithmetic number, because the mean of its divisors is an integer number (12258988).

Almost surely, 2^42906451 is an apocalyptic number.

42906451 is a deficient number, since it is larger than the sum of its proper divisors (6129501).

42906451 is an equidigital number, since it uses as much as digits as its factorization.

42906451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129500.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 42906451 is about 6550.3015961099. The cubic root of 42906451 is about 350.0855600349.

The spelling of 42906451 in words is "forty-two million, nine hundred six thousand, four hundred fifty-one".