61122751 has 4 divisors (see below), whose sum is σ = 61153792. Its totient is φ = 61091712.

The previous prime is 61122709. The next prime is 61122757. The reversal of 61122751 is 15722116.

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 61122751 - 2⁹ = 61122239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61122757) 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, 12351 + ... + 16576.

It is an arithmetic number, because the mean of its divisors is an integer number (15288448).

Almost surely, 2^61122751 is an apocalyptic number.

61122751 is a deficient number, since it is larger than the sum of its proper divisors (31041).

61122751 is a wasteful number, since it uses less digits than its factorization.

61122751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31040.

The product of its digits is 840, while the sum is 25.

The square root of 61122751 is about 7818.1040540530. The cubic root of 61122751 is about 393.9135900071.

Adding to 61122751 its reverse (15722116), we get a palindrome (76844867).

The spelling of 61122751 in words is "sixty-one million, one hundred twenty-two thousand, seven hundred fifty-one".