61572845 has 4 divisors (see below), whose sum is σ = 73887420. Its totient is φ = 49258272.

The previous prime is 61572839. The next prime is 61572877. The reversal of 61572845 is 54827516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34833604 + 26739241 = 5902^2 + 5171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61572845 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61572799 and 61572808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6157280 + ... + 6157289.

It is an arithmetic number, because the mean of its divisors is an integer number (18471855).

Almost surely, 2^61572845 is an apocalyptic number.

It is an amenable number.

61572845 is a deficient number, since it is larger than the sum of its proper divisors (12314575).

61572845 is a wasteful number, since it uses less digits than its factorization.

61572845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12314574.

The product of its digits is 67200, while the sum is 38.

The square root of 61572845 is about 7846.8366237612. The cubic root of 61572845 is about 394.8781229500.

The spelling of 61572845 in words is "sixty-one million, five hundred seventy-two thousand, eight hundred forty-five".