42420951 has 6 divisors (see below), whose sum is σ = 61274720. Its totient is φ = 28280628.

The previous prime is 42420949. The next prime is 42420971. The reversal of 42420951 is 15902424.

It is not a de Polignac number, because 42420951 - 2¹ = 42420949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2356711 + ... + 2356728.

Almost surely, 2^42420951 is an apocalyptic number.

42420951 is a deficient number, since it is larger than the sum of its proper divisors (18853769).

42420951 is a wasteful number, since it uses less digits than its factorization.

42420951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713445 (or 4713442 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 42420951 is about 6513.1368018797. The cubic root of 42420951 is about 348.7601053071.

The spelling of 42420951 in words is "forty-two million, four hundred twenty thousand, nine hundred fifty-one".