420121143 has 12 divisors (see below), whose sum is σ = 653521960. Its totient is φ = 258536016.

The previous prime is 420121087. The next prime is 420121157. The reversal of 420121143 is 341121024.

It is not a de Polignac number, because 420121143 - 2¹³ = 420112951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420121043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795273 + ... + 1795506.

Almost surely, 2^420121143 is an apocalyptic number.

420121143 is a deficient number, since it is larger than the sum of its proper divisors (233400817).

420121143 is a wasteful number, since it uses less digits than its factorization.

420121143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590798 (or 3590795 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 420121143 is about 20496.8569053892. The cubic root of 420121143 is about 748.9592337422.

Adding to 420121143 its reverse (341121024), we get a palindrome (761242167).

The spelling of 420121143 in words is "four hundred twenty million, one hundred twenty-one thousand, one hundred forty-three".