139042730 has 16 divisors (see below), whose sum is σ = 251403264. Its totient is φ = 55366800.

The previous prime is 139042723. The next prime is 139042769. The reversal of 139042730 is 37240931.

139042730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139042693 and 139042702.

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, 28946 + ... + 33405.

It is an arithmetic number, because the mean of its divisors is an integer number (15712704).

Almost surely, 2^139042730 is an apocalyptic number.

139042730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139042730 is a deficient number, since it is larger than the sum of its proper divisors (112360534).

139042730 is a wasteful number, since it uses less digits than its factorization.

139042730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62581.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 139042730 is about 11791.6381389525. The cubic root of 139042730 is about 518.0632218120.

The spelling of 139042730 in words is "one hundred thirty-nine million, forty-two thousand, seven hundred thirty".