1377139 has 4 divisors (see below), whose sum is σ = 1449640. Its totient is φ = 1304640.

The previous prime is 1377137. The next prime is 1377151. The reversal of 1377139 is 9317731.

1377139 = T₂₅₀ + T₂₅₁ + ... + T₂₈₇.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1377139 - 2¹ = 1377137 is a prime.

It is a Duffinian number.

1377139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1377139.

It is not an unprimeable number, because it can be changed into a prime (1377133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36222 + ... + 36259.

It is an arithmetic number, because the mean of its divisors is an integer number (362410).

2^1377139 is an apocalyptic number.

1377139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1377139 is a deficient number, since it is larger than the sum of its proper divisors (72501).

1377139 is an equidigital number, since it uses as much as digits as its factorization.

1377139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72500.

The product of its digits is 3969, while the sum is 31.

The square root of 1377139 is about 1173.5156581827. The cubic root of 1377139 is about 111.2566363924.

The spelling of 1377139 in words is "one million, three hundred seventy-seven thousand, one hundred thirty-nine".