42121432 has 32 divisors (see below), whose sum is σ = 82464480. Its totient is φ = 20151040.

The previous prime is 42121399. The next prime is 42121459. The reversal of 42121432 is 23412124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16173 + ... + 18595.

It is an arithmetic number, because the mean of its divisors is an integer number (2577015).

Almost surely, 2^42121432 is an apocalyptic number.

It is an amenable number.

42121432 is a deficient number, since it is larger than the sum of its proper divisors (40343048).

42121432 is a wasteful number, since it uses less digits than its factorization.

42121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523 (or 2519 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 42121432 is about 6490.1026186032. The cubic root of 42121432 is about 347.9373428392.

Adding to 42121432 its reverse (23412124), we get a palindrome (65533556).

The spelling of 42121432 in words is "forty-two million, one hundred twenty-one thousand, four hundred thirty-two".