61294721 has 8 divisors (see below), whose sum is σ = 62826624. Its totient is φ = 59772400.

The previous prime is 61294711. The next prime is 61294763. The reversal of 61294721 is 12749216.

It is a happy number.

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 61294721 - 2¹⁰ = 61293697 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61294711) 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 7 ways as a sum of consecutive naturals, for example, 11546 + ... + 15996.

It is an arithmetic number, because the mean of its divisors is an integer number (7853328).

Almost surely, 2^61294721 is an apocalyptic number.

It is an amenable number.

61294721 is a deficient number, since it is larger than the sum of its proper divisors (1531903).

61294721 is a wasteful number, since it uses less digits than its factorization.

61294721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791.

The product of its digits is 6048, while the sum is 32.

The square root of 61294721 is about 7829.0945198024. The cubic root of 61294721 is about 394.2826718279.

The spelling of 61294721 in words is "sixty-one million, two hundred ninety-four thousand, seven hundred twenty-one".