625447442 has 12 divisors (see below), whose sum is σ = 996604890. Its totient is φ = 294327936.

The previous prime is 625447439. The next prime is 625447447. The reversal of 625447442 is 244744526.

It can be written as a sum of positive squares in 3 ways, for example, as 609053041 + 16394401 = 24679^2 + 4049^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 625447396 and 625447405.

It is not an unprimeable number, because it can be changed into a prime (625447447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 540467 + ... + 541622.

Almost surely, 2^625447442 is an apocalyptic number.

625447442 is a deficient number, since it is larger than the sum of its proper divisors (371157448).

625447442 is a wasteful number, since it uses less digits than its factorization.

625447442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082125 (or 1082108 counting only the distinct ones).

The product of its digits is 215040, while the sum is 38.

The square root of 625447442 is about 25008.9472389383. The cubic root of 625447442 is about 855.1919553507.

The spelling of 625447442 in words is "six hundred twenty-five million, four hundred forty-seven thousand, four hundred forty-two".