61801 has 4 divisors (see below), whose sum is σ = 64512. Its totient is φ = 59092.

The previous prime is 61781. The next prime is 61813. The reversal of 61801 is 10816.

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 a cyclic number.

It is not a de Polignac number, because 61801 - 2⁷ = 61673 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61861) 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, 1321 + ... + 1366.

It is an arithmetic number, because the mean of its divisors is an integer number (16128).

2⁶¹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

61801 is a deficient number, since it is larger than the sum of its proper divisors (2711).

61801 is a wasteful number, since it uses less digits than its factorization.

61801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 61801 is about 248.5980691800. The cubic root of 61801 is about 39.5365255266.

The spelling of 61801 in words is "sixty-one thousand, eight hundred one".