42115810 has 16 divisors (see below), whose sum is σ = 82700352. Its totient is φ = 15314800.

The previous prime is 42115789. The next prime is 42115813. The reversal of 42115810 is 1851124.

It is a super-2 number, since 2×42115810² = 3547482903912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (42115813) 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, 191326 + ... + 191545.

It is an arithmetic number, because the mean of its divisors is an integer number (5168772).

Almost surely, 2^42115810 is an apocalyptic number.

42115810 is a deficient number, since it is larger than the sum of its proper divisors (40584542).

42115810 is a wasteful number, since it uses less digits than its factorization.

42115810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382889.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 42115810 is about 6489.6694831093. The cubic root of 42115810 is about 347.9218622736.

Adding to 42115810 its reverse (1851124), we get a palindrome (43966934).

The spelling of 42115810 in words is "forty-two million, one hundred fifteen thousand, eight hundred ten".