999125451 has 12 divisors (see below), whose sum is σ = 1505928528. Its totient is φ = 637123344.

The previous prime is 999125423. The next prime is 999125453. The reversal of 999125451 is 154521999.

999125451 is a `hidden beast` number, since 9 + 99 + 12 + 545 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-999125451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999125397 and 999125406.

It is not an unprimeable number, because it can be changed into a prime (999125453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2413140 + ... + 2413553.

It is an arithmetic number, because the mean of its divisors is an integer number (125494044).

Almost surely, 2^999125451 is an apocalyptic number.

999125451 is a deficient number, since it is larger than the sum of its proper divisors (506803077).

999125451 is a wasteful number, since it uses less digits than its factorization.

999125451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826722 (or 4826719 counting only the distinct ones).

The product of its digits is 145800, while the sum is 45.

The square root of 999125451 is about 31608.9457432544. The cubic root of 999125451 is about 999.7083986436.

The spelling of 999125451 in words is "nine hundred ninety-nine million, one hundred twenty-five thousand, four hundred fifty-one".