420100139 has 4 divisors (see below), whose sum is σ = 421617024. Its totient is φ = 418583256.

The previous prime is 420100103. The next prime is 420100159. The reversal of 420100139 is 931001024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420100139 - 2¹⁶ = 420034603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420100139.

It is not an unprimeable number, because it can be changed into a prime (420100159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758027 + ... + 758580.

It is an arithmetic number, because the mean of its divisors is an integer number (105404256).

Almost surely, 2^420100139 is an apocalyptic number.

420100139 is a deficient number, since it is larger than the sum of its proper divisors (1516885).

420100139 is a wasteful number, since it uses less digits than its factorization.

420100139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516884.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 420100139 is about 20496.3445277445. The cubic root of 420100139 is about 748.9467521027.

The spelling of 420100139 in words is "four hundred twenty million, one hundred thousand, one hundred thirty-nine".