1390139254 has 16 divisors (see below), whose sum is σ = 2386973088. Its totient is φ = 594804672.

The previous prime is 1390139227. The next prime is 1390139281. The reversal of 1390139254 is 4529310931.

It is an interprime number because it is at equal distance from previous prime (1390139227) and next prime (1390139281).

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, 71829 + ... + 89104.

It is an arithmetic number, because the mean of its divisors is an integer number (149185818).

Almost surely, 2^1390139254 is an apocalyptic number.

1390139254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1390139254 is a deficient number, since it is larger than the sum of its proper divisors (996833834).

1390139254 is a wasteful number, since it uses less digits than its factorization.

1390139254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161559.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 1390139254 is about 37284.5712594365. The cubic root of 1390139254 is about 1116.0562972889.

The spelling of 1390139254 in words is "one billion, three hundred ninety million, one hundred thirty-nine thousand, two hundred fifty-four".