42121710 has 24 divisors (see below), whose sum is σ = 109516680. Its totient is φ = 11232432.

The previous prime is 42121679. The next prime is 42121721. The reversal of 42121710 is 1712124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233920 + ... + 234099.

It is an arithmetic number, because the mean of its divisors is an integer number (4563195).

Almost surely, 2^42121710 is an apocalyptic number.

42121710 is an abundant number, since it is smaller than the sum of its proper divisors (67394970).

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

42121710 is a wasteful number, since it uses less digits than its factorization.

42121710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468032 (or 468029 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 42121710 is about 6490.1240357947. The cubic root of 42121710 is about 347.9381082956.

Adding to 42121710 its reverse (1712124), we get a palindrome (43833834).

The spelling of 42121710 in words is "forty-two million, one hundred twenty-one thousand, seven hundred ten".