42097812 has 24 divisors (see below), whose sum is σ = 98453376. Its totient is φ = 14000448.

The previous prime is 42097807. The next prime is 42097813. The reversal of 42097812 is 21879024.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42097813) 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, 1768 + ... + 9344.

It is an arithmetic number, because the mean of its divisors is an integer number (4102224).

Almost surely, 2^42097812 is an apocalyptic number.

It is an amenable number.

42097812 is an abundant number, since it is smaller than the sum of its proper divisors (56355564).

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

42097812 is a wasteful number, since it uses less digits than its factorization.

42097812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047 (or 8045 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 42097812 is about 6488.2826695513. The cubic root of 42097812 is about 347.8722942698.

It can be divided in two parts, 4209 and 7812, that added together give a palindrome (12021).

The spelling of 42097812 in words is "forty-two million, ninety-seven thousand, eight hundred twelve".