42021402 has 16 divisors (see below), whose sum is σ = 84186432. Its totient is φ = 13983200.

The previous prime is 42021401. The next prime is 42021509. The reversal of 42021402 is 20412024.

It is not an unprimeable number, because it can be changed into a prime (42021401) 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, 1974 + ... + 9377.

It is an arithmetic number, because the mean of its divisors is an integer number (5261652).

Almost surely, 2^42021402 is an apocalyptic number.

42021402 is an abundant number, since it is smaller than the sum of its proper divisors (42165030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42021402 is a wasteful number, since it uses less digits than its factorization.

42021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11973.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 42021402 is about 6482.3916882583. The cubic root of 42021402 is about 347.6616972581.

Adding to 42021402 its reverse (20412024), we get a palindrome (62433426).

The spelling of 42021402 in words is "forty-two million, twenty-one thousand, four hundred two".