1372391 has 2 divisors, whose sum is σ = 1372392. Its totient is φ = 1372390.

The previous prime is 1372379. The next prime is 1372403. The reversal of 1372391 is 1932731.

It is a balanced prime because it is at equal distance from previous prime (1372379) and next prime (1372403).

It is an emirp because it is prime and its reverse (1932731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1372391 - 2¹⁴ = 1356007 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1372391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686195 + 686196.

It is an arithmetic number, because the mean of its divisors is an integer number (686196).

2^1372391 is an apocalyptic number.

1372391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372391 is an equidigital number, since it uses as much as digits as its factorization.

1372391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 26.

The square root of 1372391 is about 1171.4909303960. The cubic root of 1372391 is about 111.1286283123.

The spelling of 1372391 in words is "one million, three hundred seventy-two thousand, three hundred ninety-one".