61287345 has 48 divisors (see below), whose sum is σ = 123731712. Its totient is φ = 27480960.

The previous prime is 61287337. The next prime is 61287367. The reversal of 61287345 is 54378216.

61287345 is a `hidden beast` number, since 612 + 8 + 7 + 34 + 5 = 666.

It is not a de Polignac number, because 61287345 - 2³ = 61287337 is a prime.

It is a super-2 number, since 2×61287345² = 7512277314298050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14860 + ... + 18530.

It is an arithmetic number, because the mean of its divisors is an integer number (2577744).

Almost surely, 2^61287345 is an apocalyptic number.

It is an amenable number.

61287345 is an abundant number, since it is smaller than the sum of its proper divisors (62444367).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61287345 is a wasteful number, since it uses less digits than its factorization.

61287345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3739 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 61287345 is about 7828.6234422151. The cubic root of 61287345 is about 394.2668556445.

The spelling of 61287345 in words is "sixty-one million, two hundred eighty-seven thousand, three hundred forty-five".