1397915 has 4 divisors (see below), whose sum is σ = 1677504. Its totient is φ = 1118328.

The previous prime is 1397909. The next prime is 1397933. The reversal of 1397915 is 5197931.

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 1397915 - 2¹⁶ = 1332379 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139787 + ... + 139796.

It is an arithmetic number, because the mean of its divisors is an integer number (419376).

2^1397915 is an apocalyptic number.

1397915 is a deficient number, since it is larger than the sum of its proper divisors (279589).

1397915 is an equidigital number, since it uses as much as digits as its factorization.

1397915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279588.

The product of its digits is 8505, while the sum is 35.

The square root of 1397915 is about 1182.3345550224. The cubic root of 1397915 is about 111.8133317008.

The spelling of 1397915 in words is "one million, three hundred ninety-seven thousand, nine hundred fifteen".