1252779 has 8 divisors (see below), whose sum is σ = 1822272. Its totient is φ = 759240.

The previous prime is 1252777. The next prime is 1252799. The reversal of 1252779 is 9772521.

1252779 = T₁₀₇ + T₁₀₈ + ... + T₂₀₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1252779 - 2¹ = 1252777 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 37963 = 1252779 / (1 + 2 + 5 + 2 + 7 + 7 + 9).

1252779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1252777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18949 + ... + 19014.

It is an arithmetic number, because the mean of its divisors is an integer number (227784).

2^1252779 is an apocalyptic number.

1252779 is a deficient number, since it is larger than the sum of its proper divisors (569493).

1252779 is a wasteful number, since it uses less digits than its factorization.

1252779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37977.

The product of its digits is 8820, while the sum is 33.

The square root of 1252779 is about 1119.2761053467. The cubic root of 1252779 is about 107.8015044027.

The spelling of 1252779 in words is "one million, two hundred fifty-two thousand, seven hundred seventy-nine".