61321825 has 12 divisors (see below), whose sum is σ = 77082988. Its totient is φ = 48384000.

The previous prime is 61321783. The next prime is 61321831. The reversal of 61321825 is 52812316.

It can be written as a sum of positive squares in 6 ways, for example, as 11999296 + 49322529 = 3464^2 + 7023^2 .

It is not a de Polignac number, because 61321825 - 2¹¹ = 61319777 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61321793 and 61321802.

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, 14976 + ... + 18625.

Almost surely, 2^61321825 is an apocalyptic number.

It is an amenable number.

61321825 is a deficient number, since it is larger than the sum of its proper divisors (15761163).

61321825 is a wasteful number, since it uses less digits than its factorization.

61321825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33684 (or 33679 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 61321825 is about 7830.8253077182. The cubic root of 61321825 is about 394.3407794027.

The spelling of 61321825 in words is "sixty-one million, three hundred twenty-one thousand, eight hundred twenty-five".