1289379 has 16 divisors (see below), whose sum is σ = 2116352. Its totient is φ = 679968.

The previous prime is 1289371. The next prime is 1289381. The reversal of 1289379 is 9739821.

1289379 = T₁₇₀ + T₁₇₁ + ... + T₂₃₂.

It is not a de Polignac number, because 1289379 - 2³ = 1289371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1289371) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2089 + ... + 2634.

It is an arithmetic number, because the mean of its divisors is an integer number (132272).

2^1289379 is an apocalyptic number.

1289379 is a deficient number, since it is larger than the sum of its proper divisors (826973).

1289379 is a wasteful number, since it uses less digits than its factorization.

1289379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746.

The product of its digits is 27216, while the sum is 39.

The square root of 1289379 is about 1135.5082562448. The cubic root of 1289379 is about 108.8412525138.

The spelling of 1289379 in words is "one million, two hundred eighty-nine thousand, three hundred seventy-nine".