1019878245 has 24 divisors (see below), whose sum is σ = 1769859936. Its totient is φ = 543297888.

The previous prime is 1019878231. The next prime is 1019878271. The reversal of 1019878245 is 5428789101.

It is not a de Polignac number, because 1019878245 - 2⁷ = 1019878117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1019878245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26902 + ... + 52568.

It is an arithmetic number, because the mean of its divisors is an integer number (73744164).

Almost surely, 2^1019878245 is an apocalyptic number.

1019878245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1019878245 is a deficient number, since it is larger than the sum of its proper divisors (749981691).

1019878245 is a wasteful number, since it uses less digits than its factorization.

1019878245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26561 (or 26558 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1019878245 is about 31935.5326399921. The cubic root of 1019878245 is about 1006.5826552382.

The spelling of 1019878245 in words is "one billion, nineteen million, eight hundred seventy-eight thousand, two hundred forty-five".