61122643 has 4 divisors (see below), whose sum is σ = 62158680. Its totient is φ = 60086608.

The previous prime is 61122641. The next prime is 61122647. The reversal of 61122643 is 34622116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61122643 - 2¹ = 61122641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61122641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517930 + ... + 518047.

It is an arithmetic number, because the mean of its divisors is an integer number (15539670).

Almost surely, 2^61122643 is an apocalyptic number.

61122643 is a deficient number, since it is larger than the sum of its proper divisors (1036037).

61122643 is a wasteful number, since it uses less digits than its factorization.

61122643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036036.

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

The square root of 61122643 is about 7818.0971470045. The cubic root of 61122643 is about 393.9133580002.

Adding to 61122643 its reverse (34622116), we get a palindrome (95744759).

The spelling of 61122643 in words is "sixty-one million, one hundred twenty-two thousand, six hundred forty-three".