42421413 has 16 divisors (see below), whose sum is σ = 58478400. Its totient is φ = 27338880.

The previous prime is 42421411. The next prime is 42421459. The reversal of 42421413 is 31412424.

It is not a de Polignac number, because 42421413 - 2¹ = 42421411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42421413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421411) 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, 8833 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (3654900).

Almost surely, 2^42421413 is an apocalyptic number.

It is an amenable number.

42421413 is a deficient number, since it is larger than the sum of its proper divisors (16056987).

42421413 is a wasteful number, since it uses less digits than its factorization.

42421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052.

The product of its digits is 768, while the sum is 21.

The square root of 42421413 is about 6513.1722685647. The cubic root of 42421413 is about 348.7613713999.

Adding to 42421413 its reverse (31412424), we get a palindrome (73833837).

The spelling of 42421413 in words is "forty-two million, four hundred twenty-one thousand, four hundred thirteen".