1253979 has 12 divisors (see below), whose sum is σ = 1821456. Its totient is φ = 831312.

The previous prime is 1253969. The next prime is 1253999. The reversal of 1253979 is 9793521.

It is not a de Polignac number, because 1253979 - 2⁴ = 1253963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1253909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2242 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (151788).

2^1253979 is an apocalyptic number.

1253979 is a deficient number, since it is larger than the sum of its proper divisors (567477).

1253979 is a wasteful number, since it uses less digits than its factorization.

1253979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 783 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 1253979 is about 1119.8120377992. The cubic root of 1253979 is about 107.8359133775.

The spelling of 1253979 in words is "one million, two hundred fifty-three thousand, nine hundred seventy-nine".