61287445 has 8 divisors (see below), whose sum is σ = 77415840. Its totient is φ = 46449360.

The previous prime is 61287439. The next prime is 61287467. The reversal of 61287445 is 54478216.

61287445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61287445 - 2⁹ = 61286933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322471 + ... + 322660.

It is an arithmetic number, because the mean of its divisors is an integer number (9676980).

Almost surely, 2^61287445 is an apocalyptic number.

It is an amenable number.

61287445 is a deficient number, since it is larger than the sum of its proper divisors (16128395).

61287445 is a wasteful number, since it uses less digits than its factorization.

61287445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645155.

The product of its digits is 53760, while the sum is 37.

The square root of 61287445 is about 7828.6298290314. The cubic root of 61287445 is about 394.2670700806.

The spelling of 61287445 in words is "sixty-one million, two hundred eighty-seven thousand, four hundred forty-five".