842450625 has 105 divisors (see below), whose sum is σ = 1615927269. Its totient is φ = 438858000.

The previous prime is 842450617. The next prime is 842450629. The reversal of 842450625 is 526054248.

It is a happy number.

The square root of 842450625 is 29025.

It is a perfect power (a square), and thus also a powerful number.

842450625 is a `hidden beast` number, since 8 + 4 + 24 + 5 + 0 + 625 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66048129 + 776402496 = 8127^2 + 27864^2 .

It is not a de Polignac number, because 842450625 - 2³ = 842450617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 842450625.

It is not an unprimeable number, because it can be changed into a prime (842450629) by changing a digit.

It is a polite number, since it can be written in 104 ways as a sum of consecutive naturals, for example, 19591854 + ... + 19591896.

Almost surely, 2^842450625 is an apocalyptic number.

842450625 is the 29025-th square number.

842450625 is the 14513-rd centered octagonal number.

It is an amenable number.

842450625 is a deficient number, since it is larger than the sum of its proper divisors (773476644).

842450625 is an frugal number, since it uses more digits than its factorization.

842450625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The cubic root of 842450625 is about 944.4554686013.

Multiplying 842450625 by its sum of digits (36), we get a square (30328222500 = 174150²).

It can be divided in two parts, 8424 and 50625, that added together give a 10-th power (59049 = 3¹⁰).

The spelling of 842450625 in words is "eight hundred forty-two million, four hundred fifty thousand, six hundred twenty-five".