61220641 has 12 divisors (see below), whose sum is σ = 67377520. Its totient is φ = 55467720.

The previous prime is 61220617. The next prime is 61220651. The reversal of 61220641 is 14602216.

It is not a de Polignac number, because 61220641 - 2⁹ = 61220129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61220611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7006 + ... + 13096.

Almost surely, 2^61220641 is an apocalyptic number.

It is an amenable number.

61220641 is a deficient number, since it is larger than the sum of its proper divisors (6156879).

61220641 is a wasteful number, since it uses less digits than its factorization.

61220641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156 (or 6133 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 61220641 is about 7824.3620187208. The cubic root of 61220641 is about 394.1237661628.

Adding to 61220641 its reverse (14602216), we get a palindrome (75822857).

The spelling of 61220641 in words is "sixty-one million, two hundred twenty thousand, six hundred forty-one".