61284905 has 8 divisors (see below), whose sum is σ = 80227584. Its totient is φ = 44570800.

The previous prime is 61284889. The next prime is 61284911. The reversal of 61284905 is 50948216.

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

It is not a de Polignac number, because 61284905 - 2⁴ = 61284889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557081 + ... + 557190.

It is an arithmetic number, because the mean of its divisors is an integer number (10028448).

Almost surely, 2^61284905 is an apocalyptic number.

It is an amenable number.

61284905 is a deficient number, since it is larger than the sum of its proper divisors (18942679).

61284905 is a wasteful number, since it uses less digits than its factorization.

61284905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114287.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 61284905 is about 7828.4676022833. The cubic root of 61284905 is about 394.2616233305.

The spelling of 61284905 in words is "sixty-one million, two hundred eighty-four thousand, nine hundred five".