420040142 has 16 divisors (see below), whose sum is σ = 651041664. Its totient is φ = 203040000.

The previous prime is 420040141. The next prime is 420040171. The reversal of 420040142 is 241040024.

It is a self number, because there is not a number n which added to its sum of digits gives 420040142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420040141) 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, 71642 + ... + 77282.

It is an arithmetic number, because the mean of its divisors is an integer number (40690104).

Almost surely, 2^420040142 is an apocalyptic number.

420040142 is a deficient number, since it is larger than the sum of its proper divisors (231001522).

420040142 is a wasteful number, since it uses less digits than its factorization.

420040142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875.

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

The square root of 420040142 is about 20494.8808730375. The cubic root of 420040142 is about 748.9110965582.

Adding to 420040142 its reverse (241040024), we get a palindrome (661080166).

The spelling of 420040142 in words is "four hundred twenty million, forty thousand, one hundred forty-two".