42661457 has 4 divisors (see below), whose sum is σ = 42863856. Its totient is φ = 42459060.

The previous prime is 42661447. The next prime is 42661469. The reversal of 42661457 is 75416624.

42661457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42661457 - 2⁶ = 42661393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42661447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100883 + ... + 101304.

It is an arithmetic number, because the mean of its divisors is an integer number (10715964).

Almost surely, 2^42661457 is an apocalyptic number.

It is an amenable number.

42661457 is a deficient number, since it is larger than the sum of its proper divisors (202399).

42661457 is a wasteful number, since it uses less digits than its factorization.

42661457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202398.

The product of its digits is 40320, while the sum is 35.

The square root of 42661457 is about 6531.5738532149. The cubic root of 42661457 is about 349.4179632437.

The spelling of 42661457 in words is "forty-two million, six hundred sixty-one thousand, four hundred fifty-seven".