1425486779 has 4 divisors (see below), whose sum is σ = 1425562776. Its totient is φ = 1425410784.

The previous prime is 1425486773. The next prime is 1425486791. The reversal of 1425486779 is 9776845241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1425486779 - 2⁴ = 1425486763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1425486779.

It is not an unprimeable number, because it can be changed into a prime (1425486773) 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, 12572 + ... + 54854.

It is an arithmetic number, because the mean of its divisors is an integer number (356390694).

Almost surely, 2^1425486779 is an apocalyptic number.

1425486779 is a deficient number, since it is larger than the sum of its proper divisors (75997).

1425486779 is an equidigital number, since it uses as much as digits as its factorization.

1425486779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75996.

The product of its digits is 3386880, while the sum is 53.

The square root of 1425486779 is about 37755.6191711909. The cubic root of 1425486779 is about 1125.4366776222.

The spelling of 1425486779 in words is "one billion, four hundred twenty-five million, four hundred eighty-six thousand, seven hundred seventy-nine".