1019402485 has 4 divisors (see below), whose sum is σ = 1223282988. Its totient is φ = 815521984.

The previous prime is 1019402479. The next prime is 1019402533. The reversal of 1019402485 is 5842049101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 298909521 + 720492964 = 17289^2 + 26842^2 .

It is a cyclic number.

It is not a de Polignac number, because 1019402485 - 2¹⁵ = 1019369717 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 1019402485.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101940244 + ... + 101940253.

It is an arithmetic number, because the mean of its divisors is an integer number (305820747).

Almost surely, 2^1019402485 is an apocalyptic number.

It is an amenable number.

1019402485 is a deficient number, since it is larger than the sum of its proper divisors (203880503).

1019402485 is an equidigital number, since it uses as much as digits as its factorization.

1019402485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203880502.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1019402485 is about 31928.0830148006. The cubic root of 1019402485 is about 1006.4261116340.

The spelling of 1019402485 in words is "one billion, nineteen million, four hundred two thousand, four hundred eighty-five".