61138 has 16 divisors (see below), whose sum is σ = 114624. Its totient is φ = 23760.

The previous prime is 61129. The next prime is 61141. The reversal of 61138 is 83116.

It is a nialpdrome in base 16.

It is an unprimeable number.

61138 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, 45 + ... + 352.

It is an arithmetic number, because the mean of its divisors is an integer number (7164).

2⁶¹¹³⁸ is an apocalyptic number.

61138 is a deficient number, since it is larger than the sum of its proper divisors (53486).

61138 is a wasteful number, since it uses less digits than its factorization.

61138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417.

The product of its digits is 144, while the sum is 19.

The square root of 61138 is about 247.2609957110. The cubic root of 61138 is about 39.3946345344.

The spelling of 61138 in words is "sixty-one thousand, one hundred thirty-eight".