61011 has 6 divisors (see below), whose sum is σ = 88140. Its totient is φ = 40668.

The previous prime is 61007. The next prime is 61027. The reversal of 61011 is 11016.

It is not a de Polignac number, because 61011 - 2² = 61007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 6779 = 61011 / (6 + 1 + 0 + 1 + 1).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 60984 and 61002.

It is not an unprimeable number, because it can be changed into a prime (61001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3381 + ... + 3398.

It is an arithmetic number, because the mean of its divisors is an integer number (14690).

2⁶¹⁰¹¹ is an apocalyptic number.

61011 is a deficient number, since it is larger than the sum of its proper divisors (27129).

61011 is a wasteful number, since it uses less digits than its factorization.

61011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6785 (or 6782 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 61011 is about 247.0040485498. The cubic root of 61011 is about 39.3673378893.

Adding to 61011 its reverse (11016), we get a palindrome (72027).

The spelling of 61011 in words is "sixty-one thousand, eleven".