61123 has 4 divisors (see below), whose sum is σ = 64360. Its totient is φ = 57888.

The previous prime is 61121. The next prime is 61129. The reversal of 61123 is 32116.

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

It is a cyclic number.

It is not a de Polignac number, because 61123 - 2¹ = 61121 is a prime.

It is a super-2 number, since 2×61123² = 7472042258, which contains 22 as substring.

It is a Duffinian number.

61123 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (61121) 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, 1590 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (16090).

2⁶¹¹²³ is an apocalyptic number.

61123 is a deficient number, since it is larger than the sum of its proper divisors (3237).

61123 is a wasteful number, since it uses less digits than its factorization.

61123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236.

The product of its digits is 36, while the sum is 13.

The square root of 61123 is about 247.2306615289. The cubic root of 61123 is about 39.3914124911.

Adding to 61123 its reverse (32116), we get a palindrome (93239).

It can be divided in two parts, 6112 and 3, that multiplied together give a triangular number (18336 = T₁₉₁).

The spelling of 61123 in words is "sixty-one thousand, one hundred twenty-three".