42420461 has 4 divisors (see below), whose sum is σ = 43323072. Its totient is φ = 41517852.

The previous prime is 42420451. The next prime is 42420467. The reversal of 42420461 is 16402424.

42420461 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 a de Polignac number, because none of the positive numbers 2^k-42420461 is a prime.

It is a super-2 number, since 2×42420461² = 3598991022905042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420467) 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, 451235 + ... + 451328.

It is an arithmetic number, because the mean of its divisors is an integer number (10830768).

Almost surely, 2^42420461 is an apocalyptic number.

It is an amenable number.

42420461 is a deficient number, since it is larger than the sum of its proper divisors (902611).

42420461 is an equidigital number, since it uses as much as digits as its factorization.

42420461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902610.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 42420461 is about 6513.0991854877. The cubic root of 42420461 is about 348.7587624713.

Adding to 42420461 its reverse (16402424), we get a palindrome (58822885).

The spelling of 42420461 in words is "forty-two million, four hundred twenty thousand, four hundred sixty-one".