139212430 has 72 divisors (see below), whose sum is σ = 308033928. Its totient is φ = 45160416.

The previous prime is 139212427. The next prime is 139212461. The reversal of 139212430 is 34212931.

It is a junction number, because it is equal to n+sod(n) for n = 139212395 and 139212404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 176497 + ... + 177283.

It is an arithmetic number, because the mean of its divisors is an integer number (4278249).

Almost surely, 2^139212430 is an apocalyptic number.

139212430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139212430 is an abundant number, since it is smaller than the sum of its proper divisors (168821498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139212430 is a wasteful number, since it uses less digits than its factorization.

139212430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 139212430 is about 11798.8317218274. The cubic root of 139212430 is about 518.2738994610.

The spelling of 139212430 in words is "one hundred thirty-nine million, two hundred twelve thousand, four hundred thirty".