61281867 has 8 divisors (see below), whose sum is σ = 85261824. Its totient is φ = 39078248.

The previous prime is 61281863. The next prime is 61281877. The reversal of 61281867 is 76818216.

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

It is a cyclic number.

It is not a de Polignac number, because 61281867 - 2² = 61281863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61281863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444003 + ... + 444140.

It is an arithmetic number, because the mean of its divisors is an integer number (10657728).

Almost surely, 2^61281867 is an apocalyptic number.

61281867 is a deficient number, since it is larger than the sum of its proper divisors (23979957).

61281867 is a wasteful number, since it uses less digits than its factorization.

61281867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888169.

The product of its digits is 32256, while the sum is 39.

The square root of 61281867 is about 7828.2735644585. The cubic root of 61281867 is about 394.2551084766.

The spelling of 61281867 in words is "sixty-one million, two hundred eighty-one thousand, eight hundred sixty-seven".