1390139 has 8 divisors (see below), whose sum is σ = 1429680. Its totient is φ = 1351296.

The previous prime is 1390121. The next prime is 1390157. The reversal of 1390139 is 9310931.

It is an interprime number because it is at equal distance from previous prime (1390121) and next prime (1390157).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1390139 - 2¹² = 1386043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1390159) 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, 9932 + ... + 10070.

It is an arithmetic number, because the mean of its divisors is an integer number (178710).

2^1390139 is an apocalyptic number.

1390139 is a deficient number, since it is larger than the sum of its proper divisors (39541).

1390139 is a wasteful number, since it uses less digits than its factorization.

1390139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 1390139 is about 1179.0415599121. The cubic root of 1390139 is about 111.6056229315.

The spelling of 1390139 in words is "one million, three hundred ninety thousand, one hundred thirty-nine".