139000420 has 24 divisors (see below), whose sum is σ = 314355384. Its totient is φ = 51323136.

The previous prime is 139000391. The next prime is 139000423. The reversal of 139000420 is 24000931.

139000420 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 31629376 + 107371044 = 5624^2 + 10362^2 .

It is a super-2 number, since 2×139000420² = 38642233520352800, which contains 22 as substring.

139000420 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (139000423) 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, 267049 + ... + 267568.

It is an arithmetic number, because the mean of its divisors is an integer number (13098141).

Almost surely, 2^139000420 is an apocalyptic number.

139000420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139000420 is an abundant number, since it is smaller than the sum of its proper divisors (175354964).

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

139000420 is a wasteful number, since it uses less digits than its factorization.

139000420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534639 (or 534637 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 139000420 is about 11789.8439345057. The cubic root of 139000420 is about 518.0106684743.

The spelling of 139000420 in words is "one hundred thirty-nine million, four hundred twenty", and thus it is an aban number.