42020457 has 16 divisors (see below), whose sum is σ = 59861760. Its totient is φ = 26140752.

The previous prime is 42020441. The next prime is 42020483. The reversal of 42020457 is 75402024.

It is not a de Polignac number, because 42020457 - 2⁴ = 42020441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42020437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1683 + ... + 9320.

It is an arithmetic number, because the mean of its divisors is an integer number (3741360).

Almost surely, 2^42020457 is an apocalyptic number.

It is an amenable number.

42020457 is a deficient number, since it is larger than the sum of its proper divisors (17841303).

42020457 is a wasteful number, since it uses less digits than its factorization.

42020457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 42020457 is about 6482.3187980845. The cubic root of 42020457 is about 347.6590911038.

The spelling of 42020457 in words is "forty-two million, twenty thousand, four hundred fifty-seven".