42400124 has 24 divisors (see below), whose sum is σ = 81223968. Its totient is φ = 19247040.

The previous prime is 42400121. The next prime is 42400139. The reversal of 42400124 is 42100424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42400121) 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, 3512 + ... + 9855.

It is an arithmetic number, because the mean of its divisors is an integer number (3384332).

Almost surely, 2^42400124 is an apocalyptic number.

It is an amenable number.

42400124 is a deficient number, since it is larger than the sum of its proper divisors (38823844).

42400124 is a wasteful number, since it uses less digits than its factorization.

42400124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13445 (or 13443 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 42400124 is about 6511.5377600072. The cubic root of 42400124 is about 348.7030201830.

Adding to 42400124 its reverse (42100424), we get a palindrome (84500548).

It can be divided in two parts, 42400 and 124, that added together give a palindrome (42524).

The spelling of 42400124 in words is "forty-two million, four hundred thousand, one hundred twenty-four".