61345871 has 4 divisors (see below), whose sum is σ = 61609392. Its totient is φ = 61082352.

The previous prime is 61345861. The next prime is 61345891. The reversal of 61345871 is 17854316.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61345871 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 (61345811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131411 + ... + 131876.

It is an arithmetic number, because the mean of its divisors is an integer number (15402348).

Almost surely, 2^61345871 is an apocalyptic number.

61345871 is a deficient number, since it is larger than the sum of its proper divisors (263521).

61345871 is a wasteful number, since it uses less digits than its factorization.

61345871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263520.

The product of its digits is 20160, while the sum is 35.

The square root of 61345871 is about 7832.3604998749. The cubic root of 61345871 is about 394.3923166774.

The spelling of 61345871 in words is "sixty-one million, three hundred forty-five thousand, eight hundred seventy-one".