61601243 has 4 divisors (see below), whose sum is σ = 67201368. Its totient is φ = 56001120.

The previous prime is 61601231. The next prime is 61601279. The reversal of 61601243 is 34210616.

It is a happy number.

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 61601243 - 2⁴ = 61601227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61606243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2800046 + ... + 2800067.

It is an arithmetic number, because the mean of its divisors is an integer number (16800342).

Almost surely, 2^61601243 is an apocalyptic number.

61601243 is a deficient number, since it is larger than the sum of its proper divisors (5600125).

61601243 is a wasteful number, since it uses less digits than its factorization.

61601243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600124.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 61601243 is about 7848.6459341723. The cubic root of 61601243 is about 394.9388208405.

Adding to 61601243 its reverse (34210616), we get a palindrome (95811859).

The spelling of 61601243 in words is "sixty-one million, six hundred one thousand, two hundred forty-three".