61206445 has 4 divisors (see below), whose sum is σ = 73447740. Its totient is φ = 48965152.

The previous prime is 61206437. The next prime is 61206449. The reversal of 61206445 is 54460216.

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 17791524 + 43414921 = 4218^2 + 6589^2 .

It is a cyclic number.

It is not a de Polignac number, because 61206445 - 2³ = 61206437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61206449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120640 + ... + 6120649.

It is an arithmetic number, because the mean of its divisors is an integer number (18361935).

Almost surely, 2^61206445 is an apocalyptic number.

It is an amenable number.

61206445 is a deficient number, since it is larger than the sum of its proper divisors (12241295).

61206445 is a wasteful number, since it uses less digits than its factorization.

61206445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12241294.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 61206445 is about 7823.4547995115. The cubic root of 61206445 is about 394.0933003297.

The spelling of 61206445 in words is "sixty-one million, two hundred six thousand, four hundred forty-five".