139751420 has 24 divisors (see below), whose sum is σ = 293706000. Its totient is φ = 55857152.

The previous prime is 139751401. The next prime is 139751483. The reversal of 139751420 is 24157931.

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, 40316 + ... + 43644.

It is an arithmetic number, because the mean of its divisors is an integer number (12237750).

Almost surely, 2^139751420 is an apocalyptic number.

139751420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139751420 is an abundant number, since it is smaller than the sum of its proper divisors (153954580).

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

139751420 is a wasteful number, since it uses less digits than its factorization.

139751420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437 (or 5435 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 139751420 is about 11821.6504769850. The cubic root of 139751420 is about 518.9419066427.

The spelling of 139751420 in words is "one hundred thirty-nine million, seven hundred fifty-one thousand, four hundred twenty".