61355 has 8 divisors (see below), whose sum is σ = 84192. Its totient is φ = 42048.

The previous prime is 61343. The next prime is 61357. The reversal of 61355 is 55316.

61355 = T₁₄₀ + T₁₄₁ + ... + T₁₄₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61355 - 2⁴ = 61339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842 + ... + 911.

It is an arithmetic number, because the mean of its divisors is an integer number (10524).

2⁶¹³⁵⁵ is an apocalyptic number.

61355 is a deficient number, since it is larger than the sum of its proper divisors (22837).

61355 is a wasteful number, since it uses less digits than its factorization.

61355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765.

The product of its digits is 450, while the sum is 20.

The square root of 61355 is about 247.6994146138. The cubic root of 61355 is about 39.4411879140.

The spelling of 61355 in words is "sixty-one thousand, three hundred fifty-five".