1005640425 has 36 divisors (see below), whose sum is σ = 1803460464. Its totient is φ = 535672800.

The previous prime is 1005640409. The next prime is 1005640439. The reversal of 1005640425 is 5240465001.

1005640425 is a `hidden beast` number, since 10 + 0 + 5 + 640 + 4 + 2 + 5 = 666.

It is not a de Polignac number, because 1005640425 - 2⁴ = 1005640409 is a prime.

It is a super-2 number, since 2×1005640425² = 2022625328788361250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 216174 + ... + 220776.

It is an arithmetic number, because the mean of its divisors is an integer number (50096124).

Almost surely, 2^1005640425 is an apocalyptic number.

1005640425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005640425 is a deficient number, since it is larger than the sum of its proper divisors (797820039).

1005640425 is a wasteful number, since it uses less digits than its factorization.

1005640425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5590 (or 5582 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1005640425 is about 31711.8341475229. The cubic root of 1005640425 is about 1001.8766177695.

The spelling of 1005640425 in words is "one billion, five million, six hundred forty thousand, four hundred twenty-five".