42115457 has 4 divisors (see below), whose sum is σ = 44332080. Its totient is φ = 39898836.

The previous prime is 42115441. The next prime is 42115459. The reversal of 42115457 is 75451124.

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 42115457 - 2⁴ = 42115441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42115459) 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, 1108283 + ... + 1108320.

It is an arithmetic number, because the mean of its divisors is an integer number (11083020).

Almost surely, 2^42115457 is an apocalyptic number.

It is an amenable number.

42115457 is a deficient number, since it is larger than the sum of its proper divisors (2216623).

42115457 is a wasteful number, since it uses less digits than its factorization.

42115457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216622.

The product of its digits is 5600, while the sum is 29.

The square root of 42115457 is about 6489.6422859816. The cubic root of 42115457 is about 347.9208902177.

The spelling of 42115457 in words is "forty-two million, one hundred fifteen thousand, four hundred fifty-seven".