61221634 has 8 divisors (see below), whose sum is σ = 91866060. Its totient is φ = 30599616.

The previous prime is 61221631. The next prime is 61221649. The reversal of 61221634 is 43612216.

It can be written as a sum of positive squares in 2 ways, for example, as 47568609 + 13653025 = 6897^2 + 3695^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 61221599 and 61221608.

It is not an unprimeable number, because it can be changed into a prime (61221631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6222 + ... + 12694.

Almost surely, 2^61221634 is an apocalyptic number.

61221634 is a deficient number, since it is larger than the sum of its proper divisors (30644426).

61221634 is a wasteful number, since it uses less digits than its factorization.

61221634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11204.

The product of its digits is 1728, while the sum is 25.

The square root of 61221634 is about 7824.4254741163. The cubic root of 61221634 is about 394.1258970497.

The spelling of 61221634 in words is "sixty-one million, two hundred twenty-one thousand, six hundred thirty-four".