61421224 has 32 divisors (see below), whose sum is σ = 126504000. Its totient is φ = 27827712.

The previous prime is 61421219. The next prime is 61421237. The reversal of 61421224 is 42212416.

It is a happy number.

61421224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61421195 and 61421204.

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, 5289 + ... + 12280.

It is an arithmetic number, because the mean of its divisors is an integer number (3953250).

Almost surely, 2^61421224 is an apocalyptic number.

It is an amenable number.

61421224 is an abundant number, since it is smaller than the sum of its proper divisors (65082776).

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

61421224 is a wasteful number, since it uses less digits than its factorization.

61421224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17617 (or 17613 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 61421224 is about 7837.1693869662. The cubic root of 61421224 is about 394.5537319661.

The spelling of 61421224 in words is "sixty-one million, four hundred twenty-one thousand, two hundred twenty-four".