1420779 has 16 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 888096.

The previous prime is 1420777. The next prime is 1420789. The reversal of 1420779 is 9770241.

It is not a de Polignac number, because 1420779 - 2¹ = 1420777 is a prime.

It is a super-2 number, since 2×1420779² = 4037225933682, which contains 22 as substring.

1420779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1420777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3897 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (126000).

2^1420779 is an apocalyptic number.

1420779 is a deficient number, since it is larger than the sum of its proper divisors (595221).

1420779 is a wasteful number, since it uses less digits than its factorization.

1420779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 1420779 is about 1191.9643451043. The cubic root of 1420779 is about 112.4196364337.

The spelling of 1420779 in words is "one million, four hundred twenty thousand, seven hundred seventy-nine".