42936421 has 8 divisors (see below), whose sum is σ = 47433600. Its totient is φ = 38538240.

The previous prime is 42936379. The next prime is 42936433. The reversal of 42936421 is 12463924.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42936421 - 2⁷ = 42936293 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 (42936451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23836 + ... + 25573.

It is an arithmetic number, because the mean of its divisors is an integer number (5929200).

Almost surely, 2^42936421 is an apocalyptic number.

It is an amenable number.

42936421 is a deficient number, since it is larger than the sum of its proper divisors (4497179).

42936421 is a wasteful number, since it uses less digits than its factorization.

42936421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49499.

The product of its digits is 10368, while the sum is 31.

The square root of 42936421 is about 6552.5888776880. The cubic root of 42936421 is about 350.1670522274.

The spelling of 42936421 in words is "forty-two million, nine hundred thirty-six thousand, four hundred twenty-one".