61090 has 16 divisors (see below), whose sum is σ = 113400. Its totient is φ = 23680.

The previous prime is 61057. The next prime is 61091. The reversal of 61090 is 9016.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 41209 = 141^2 + 203^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (61091) by changing a digit.

61090 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336 + ... + 484.

2⁶¹⁰⁹⁰ is an apocalyptic number.

61090 is a deficient number, since it is larger than the sum of its proper divisors (52310).

61090 is a wasteful number, since it uses less digits than its factorization.

61090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 61090 is about 247.1639132236. The cubic root of 61090 is about 39.3843221398.

The spelling of 61090 in words is "sixty-one thousand, ninety".