61449 has 4 divisors (see below), whose sum is σ = 81936. Its totient is φ = 40964.

The previous prime is 61441. The next prime is 61463. The reversal of 61449 is 94416.

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 61449 - 2³ = 61441 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (61441) 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, 10239 + ... + 10244.

It is an arithmetic number, because the mean of its divisors is an integer number (20484).

2⁶¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

61449 is a deficient number, since it is larger than the sum of its proper divisors (20487).

61449 is a wasteful number, since it uses less digits than its factorization.

61449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20486.

The product of its digits is 864, while the sum is 24.

The square root of 61449 is about 247.8890881019. The cubic root of 61449 is about 39.4613198234.

Subtracting from 61449 its sum of digits (24), we obtain a triangular number (61425 = T₃₅₀).

The spelling of 61449 in words is "sixty-one thousand, four hundred forty-nine".