420950542 has 4 divisors (see below), whose sum is σ = 631425816. Its totient is φ = 210475270.

The previous prime is 420950513. The next prime is 420950557. The reversal of 420950542 is 245059024.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 105237634 + ... + 105237637.

It is an arithmetic number, because the mean of its divisors is an integer number (157856454).

Almost surely, 2^420950542 is an apocalyptic number.

420950542 is a deficient number, since it is larger than the sum of its proper divisors (210475274).

420950542 is a wasteful number, since it uses less digits than its factorization.

420950542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210475273.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 420950542 is about 20517.0792755694. The cubic root of 420950542 is about 749.4517723967.

The spelling of 420950542 in words is "four hundred twenty million, nine hundred fifty thousand, five hundred forty-two".