1257379 has 4 divisors (see below), whose sum is σ = 1262880. Its totient is φ = 1251880.

The previous prime is 1257359. The next prime is 1257397. The reversal of 1257379 is 9737521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9737521 = 1069 ⋅9109.

It is a cyclic number.

It is not a de Polignac number, because 1257379 - 2⁷ = 1257251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257359) 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, 2392 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (315720).

2^1257379 is an apocalyptic number.

1257379 is a deficient number, since it is larger than the sum of its proper divisors (5501).

1257379 is an equidigital number, since it uses as much as digits as its factorization.

1257379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500.

The product of its digits is 13230, while the sum is 34.

The square root of 1257379 is about 1121.3291220690. The cubic root of 1257379 is about 107.9332864160.

The spelling of 1257379 in words is "one million, two hundred fifty-seven thousand, three hundred seventy-nine".