61573 has 4 divisors (see below), whose sum is σ = 62560. Its totient is φ = 60588.

The previous prime is 61561. The next prime is 61583. The reversal of 61573 is 37516.

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 61573 - 2¹³ = 53381 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393 + ... + 526.

It is an arithmetic number, because the mean of its divisors is an integer number (15640).

2⁶¹⁵⁷³ is an apocalyptic number.

It is an amenable number.

61573 is a deficient number, since it is larger than the sum of its proper divisors (987).

61573 is an equidigital number, since it uses as much as digits as its factorization.

61573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986.

The product of its digits is 630, while the sum is 22.

The square root of 61573 is about 248.1390739082. The cubic root of 61573 is about 39.4878454298.

The spelling of 61573 in words is "sixty-one thousand, five hundred seventy-three".