61306 has 16 divisors (see below), whose sum is σ = 109440. Its totient is φ = 25200.

The previous prime is 61297. The next prime is 61331. The reversal of 61306 is 60316.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 481.

It is an arithmetic number, because the mean of its divisors is an integer number (6840).

2⁶¹³⁰⁶ is an apocalyptic number.

61306 is a deficient number, since it is larger than the sum of its proper divisors (48134).

61306 is a wasteful number, since it uses less digits than its factorization.

61306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 61306 is about 247.6004846522. The cubic root of 61306 is about 39.4306854669.

Subtracting from 61306 its reverse (60316), we obtain a triangular number (990 = T₄₄).

The spelling of 61306 in words is "sixty-one thousand, three hundred six".