491420042 has 16 divisors (see below), whose sum is σ = 748077120. Its totient is φ = 242083968.

The previous prime is 491419961. The next prime is 491420129. The reversal of 491420042 is 240024194.

It is a junction number, because it is equal to n+sod(n) for n = 491419993 and 491420020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38459 + ... + 49617.

It is an arithmetic number, because the mean of its divisors is an integer number (46754820).

Almost surely, 2^491420042 is an apocalyptic number.

491420042 is a deficient number, since it is larger than the sum of its proper divisors (256657078).

491420042 is a wasteful number, since it uses less digits than its factorization.

491420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11485.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 491420042 is about 22167.9958949834. The cubic root of 491420042 is about 789.1343624100.

The spelling of 491420042 in words is "four hundred ninety-one million, four hundred twenty thousand, forty-two".