42121963 has 16 divisors (see below), whose sum is σ = 47251456. Its totient is φ = 37285920.

The previous prime is 42121951. The next prime is 42121969. The reversal of 42121963 is 36912124.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42121963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42121969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50770 + ... + 51592.

It is an arithmetic number, because the mean of its divisors is an integer number (2953216).

Almost surely, 2^42121963 is an apocalyptic number.

42121963 is a deficient number, since it is larger than the sum of its proper divisors (5129493).

42121963 is a wasteful number, since it uses less digits than its factorization.

42121963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994.

The product of its digits is 2592, while the sum is 28.

The square root of 42121963 is about 6490.1435269183. The cubic root of 42121963 is about 347.9388049132.

The spelling of 42121963 in words is "forty-two million, one hundred twenty-one thousand, nine hundred sixty-three".