61261751 has 8 divisors (see below), whose sum is σ = 63951264. Its totient is φ = 58626720.

The previous prime is 61261747. The next prime is 61261763. The reversal of 61261751 is 15716216.

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 61261751 - 2² = 61261747 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 (61261721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11315 + ... + 15828.

It is an arithmetic number, because the mean of its divisors is an integer number (7993908).

Almost surely, 2^61261751 is an apocalyptic number.

61261751 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61261751 is a deficient number, since it is larger than the sum of its proper divisors (2689513).

61261751 is a wasteful number, since it uses less digits than its factorization.

61261751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27241.

The product of its digits is 2520, while the sum is 29.

The square root of 61261751 is about 7826.9886290961. The cubic root of 61261751 is about 394.2119651887.

Adding to 61261751 its reverse (15716216), we get a palindrome (76977967).

The spelling of 61261751 in words is "sixty-one million, two hundred sixty-one thousand, seven hundred fifty-one".