1025778502 has 32 divisors (see below), whose sum is σ = 1822233600. Its totient is φ = 423940608.

The previous prime is 1025778493. The next prime is 1025778511. The reversal of 1025778502 is 2058775201.

It is an interprime number because it is at equal distance from previous prime (1025778493) and next prime (1025778511).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36774 + ... + 58342.

It is an arithmetic number, because the mean of its divisors is an integer number (56944800).

Almost surely, 2^1025778502 is an apocalyptic number.

1025778502 is a deficient number, since it is larger than the sum of its proper divisors (796455098).

1025778502 is a wasteful number, since it uses less digits than its factorization.

1025778502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21700.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 1025778502 is about 32027.7770380649. Note that the first 3 decimals coincide. The cubic root of 1025778502 is about 1008.5200368133.

The spelling of 1025778502 in words is "one billion, twenty-five million, seven hundred seventy-eight thousand, five hundred two".