42921011 has 12 divisors (see below), whose sum is σ = 50993568. Its totient is φ = 36004752.

The previous prime is 42921001. The next prime is 42921023. The reversal of 42921011 is 11012924.

It is not a de Polignac number, because 42921011 - 2²² = 38726707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42921001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7016 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (4249464).

Almost surely, 2^42921011 is an apocalyptic number.

42921011 is a deficient number, since it is larger than the sum of its proper divisors (8072557).

42921011 is a wasteful number, since it uses less digits than its factorization.

42921011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18698 (or 18691 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 42921011 is about 6551.4129010466. The cubic root of 42921011 is about 350.1251552409.

Adding to 42921011 its reverse (11012924), we get a palindrome (53933935).

The spelling of 42921011 in words is "forty-two million, nine hundred twenty-one thousand, eleven".