61455 has 16 divisors (see below), whose sum is σ = 104544. Its totient is φ = 30720.

The previous prime is 61441. The next prime is 61463. The reversal of 61455 is 55416.

It is a happy number.

61455 is nontrivially palindromic in base 2, base 4 and base 16.

61455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61455 - 2⁹ = 60943 is a prime.

61455 is a lucky number.

It is a zygodrome in base 2 and base 4.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135 + ... + 375.

It is an arithmetic number, because the mean of its divisors is an integer number (6534).

2⁶¹⁴⁵⁵ is an apocalyptic number.

61455 is a deficient number, since it is larger than the sum of its proper divisors (43089).

61455 is a wasteful number, since it uses less digits than its factorization.

61455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

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

The square root of 61455 is about 247.9011899931. The cubic root of 61455 is about 39.4626041416.

The spelling of 61455 in words is "sixty-one thousand, four hundred fifty-five".