61287056 has 10 divisors (see below), whose sum is σ = 118743702. Its totient is φ = 30643520.

The previous prime is 61287053. The next prime is 61287071. The reversal of 61287056 is 65078216.

It can be written as a sum of positive squares in only one way, i.e., 58675600 + 2611456 = 7660^2 + 1616^2 .

It is a super-2 number, since 2×61287056² = 7512206466294272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61287053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1915205 + ... + 1915236.

Almost surely, 2^61287056 is an apocalyptic number.

It is an amenable number.

61287056 is a deficient number, since it is larger than the sum of its proper divisors (57456646).

61287056 is a wasteful number, since it uses less digits than its factorization.

61287056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830449 (or 3830443 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 61287056 is about 7828.6049842868. The cubic root of 61287056 is about 394.2662359228.

The spelling of 61287056 in words is "sixty-one million, two hundred eighty-seven thousand, fifty-six".