42400142 has 8 divisors (see below), whose sum is σ = 67341456. Its totient is φ = 19952992.

The previous prime is 42400139. The next prime is 42400177. The reversal of 42400142 is 24100424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 42400142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623498 + ... + 623565.

It is an arithmetic number, because the mean of its divisors is an integer number (8417682).

Almost surely, 2^42400142 is an apocalyptic number.

42400142 is a deficient number, since it is larger than the sum of its proper divisors (24941314).

42400142 is a wasteful number, since it uses less digits than its factorization.

42400142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247082.

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

The square root of 42400142 is about 6511.5391421691. The cubic root of 42400142 is about 348.7030695276.

Adding to 42400142 its reverse (24100424), we get a palindrome (66500566).

The spelling of 42400142 in words is "forty-two million, four hundred thousand, one hundred forty-two".