420121142 has 16 divisors (see below), whose sum is σ = 733797792. Its totient is φ = 176654400.

The previous prime is 420121087. The next prime is 420121157. The reversal of 420121142 is 241121024.

It is a self number, because there is not a number n which added to its sum of digits gives 420121142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282359 + ... + 283842.

It is an arithmetic number, because the mean of its divisors is an integer number (45862362).

Almost surely, 2^420121142 is an apocalyptic number.

420121142 is a deficient number, since it is larger than the sum of its proper divisors (313676650).

420121142 is a wasteful number, since it uses less digits than its factorization.

420121142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566263.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 420121142 is about 20496.8568809952. The cubic root of 420121142 is about 748.9592331479.

Adding to 420121142 its reverse (241121024), we get a palindrome (661242166).

The spelling of 420121142 in words is "four hundred twenty million, one hundred twenty-one thousand, one hundred forty-two".