61545 has 16 divisors (see below), whose sum is σ = 107712. Its totient is φ = 29760.

The previous prime is 61543. The next prime is 61547. The reversal of 61545 is 54516.

It is a happy number.

61545 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61543) and next prime (61547).

It is not a de Polignac number, because 61545 - 2¹ = 61543 is a prime.

It is a Curzon number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22 + ... + 351.

It is an arithmetic number, because the mean of its divisors is an integer number (6732).

2⁶¹⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

61545 is a deficient number, since it is larger than the sum of its proper divisors (46167).

61545 is a wasteful number, since it uses less digits than its factorization.

61545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392.

The product of its digits is 600, while the sum is 21.

The square root of 61545 is about 248.0826475189. The cubic root of 61545 is about 39.4818588918.

It can be divided in two parts, 61 and 545, that added together give a palindrome (606).

The spelling of 61545 in words is "sixty-one thousand, five hundred forty-five".