61260861 has 4 divisors (see below), whose sum is σ = 81681152. Its totient is φ = 40840572.

The previous prime is 61260839. The next prime is 61260869. The reversal of 61260861 is 16806216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61260861 - 2¹⁰ = 61259837 is a prime.

It is a super-2 number, since 2×61260861² = 7505786180922642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61260869) 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, 10210141 + ... + 10210146.

It is an arithmetic number, because the mean of its divisors is an integer number (20420288).

Almost surely, 2^61260861 is an apocalyptic number.

It is an amenable number.

61260861 is a deficient number, since it is larger than the sum of its proper divisors (20420291).

61260861 is a wasteful number, since it uses less digits than its factorization.

61260861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420290.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 61260861 is about 7826.9317743289. The cubic root of 61260861 is about 394.2100561653.

The spelling of 61260861 in words is "sixty-one million, two hundred sixty thousand, eight hundred sixty-one".