981223425 has 144 divisors (see below), whose sum is σ = 2291103360. Its totient is φ = 389560320.

The previous prime is 981223361. The next prime is 981223457. The reversal of 981223425 is 524322189.

It is a happy number.

981223425 is a `hidden beast` number, since 9 + 8 + 1 + 223 + 425 = 666.

It is not a de Polignac number, because 981223425 - 2⁶ = 981223361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981223425.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 346666 + ... + 349484.

It is an arithmetic number, because the mean of its divisors is an integer number (15910440).

Almost surely, 2^981223425 is an apocalyptic number.

It is an amenable number.

981223425 is an abundant number, since it is smaller than the sum of its proper divisors (1309879935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981223425 is a wasteful number, since it uses less digits than its factorization.

981223425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872 (or 2864 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 981223425 is about 31324.4860293030. The cubic root of 981223425 is about 993.7015545388.

The spelling of 981223425 in words is "nine hundred eighty-one million, two hundred twenty-three thousand, four hundred twenty-five".