42097816 has 16 divisors (see below), whose sum is σ = 80859240. Its totient is φ = 20535360.

The previous prime is 42097813. The next prime is 42097819. The reversal of 42097816 is 61879024.

It is an interprime number because it is at equal distance from previous prime (42097813) and next prime (42097819).

It is a super-2 number, since 2×42097816² = 3544452223939712, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 63846 + ... + 64501.

Almost surely, 2^42097816 is an apocalyptic number.

It is an amenable number.

42097816 is a deficient number, since it is larger than the sum of its proper divisors (38761424).

42097816 is a wasteful number, since it uses less digits than its factorization.

42097816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128394 (or 128390 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 42097816 is about 6488.2829777993. The cubic root of 42097816 is about 347.8723052877.

The spelling of 42097816 in words is "forty-two million, ninety-seven thousand, eight hundred sixteen".