999994225 has 12 divisors (see below), whose sum is σ = 1305256240. Its totient is φ = 757890000.

The previous prime is 999994201. The next prime is 999994241. The reversal of 999994225 is 522499999.

It is not a de Polignac number, because 999994225 - 2⁷ = 999994097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999994225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1052151 + ... + 1053100.

Almost surely, 2^999994225 is an apocalyptic number.

999994225 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

999994225 is a deficient number, since it is larger than the sum of its proper divisors (305262015).

999994225 is a wasteful number, since it uses less digits than its factorization.

999994225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105280 (or 2105275 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 58.

The square root of 999994225 is about 31622.6852907845. The cubic root of 999994225 is about 999.9980749963.

The spelling of 999994225 in words is "nine hundred ninety-nine million, nine hundred ninety-four thousand, two hundred twenty-five".