1005646425 has 24 divisors (see below), whose sum is σ = 1900193856. Its totient is φ = 459723840.

The previous prime is 1005646381. The next prime is 1005646463. The reversal of 1005646425 is 5246465001.

It is not a de Polignac number, because 1005646425 - 2⁷ = 1005646297 is a prime.

It is a super-2 number, since 2×1005646425² = 2022649464230561250, which contains 22 as substring.

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, 957234 + ... + 958283.

It is an arithmetic number, because the mean of its divisors is an integer number (79174744).

Almost surely, 2^1005646425 is an apocalyptic number.

1005646425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005646425 is a deficient number, since it is larger than the sum of its proper divisors (894547431).

1005646425 is a wasteful number, since it uses less digits than its factorization.

1005646425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915537 (or 1915532 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 1005646425 is about 31711.9287492893. The cubic root of 1005646425 is about 1001.8786102801.

It can be divided in two parts, 1005646 and 425, that added together give a triangular number (1006071 = T₁₄₁₈).

The spelling of 1005646425 in words is "one billion, five million, six hundred forty-six thousand, four hundred twenty-five".