1391519 has 2 divisors, whose sum is σ = 1391520. Its totient is φ = 1391518.

The previous prime is 1391483. The next prime is 1391521. The reversal of 1391519 is 9151931.

It is a strong prime.

It is an emirp because it is prime and its reverse (9151931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391519 is a prime.

It is a super-2 number, since 2×1391519² = 3872650254722, which contains 22 as substring.

Together with 1391521, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1391491 and 1391500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695759 + 695760.

It is an arithmetic number, because the mean of its divisors is an integer number (695760).

2^1391519 is an apocalyptic number.

1391519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391519 is an equidigital number, since it uses as much as digits as its factorization.

1391519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215, while the sum is 29.

The square root of 1391519 is about 1179.6266358471. The cubic root of 1391519 is about 111.6425412597.

The spelling of 1391519 in words is "one million, three hundred ninety-one thousand, five hundred nineteen".