61244021 has 8 divisors (see below), whose sum is σ = 61748544. Its totient is φ = 60742080.

The previous prime is 61243981. The next prime is 61244063. The reversal of 61244021 is 12044216.

61244021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61244021 - 2²² = 57049717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61243984 and 61244002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61244221) by changing a digit.

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, 88286 + ... + 88976.

It is an arithmetic number, because the mean of its divisors is an integer number (7718568).

Almost surely, 2^61244021 is an apocalyptic number.

It is an amenable number.

61244021 is a deficient number, since it is larger than the sum of its proper divisors (504523).

61244021 is a wasteful number, since it uses less digits than its factorization.

61244021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 61244021 is about 7825.8559276286. The cubic root of 61244021 is about 394.1739313835.

Adding to 61244021 its reverse (12044216), we get a palindrome (73288237).

The spelling of 61244021 in words is "sixty-one million, two hundred forty-four thousand, twenty-one".