61158239 has 4 divisors (see below), whose sum is σ = 61524624. Its totient is φ = 60791856.

The previous prime is 61158217. The next prime is 61158259. The reversal of 61158239 is 93285116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61158239 - 2⁸ = 61157983 is a prime.

It is a super-2 number, since 2×61158239² = 7480660395162242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61158199 and 61158208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61158259) 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, 182942 + ... + 183275.

It is an arithmetic number, because the mean of its divisors is an integer number (15381156).

Almost surely, 2^61158239 is an apocalyptic number.

61158239 is a deficient number, since it is larger than the sum of its proper divisors (366385).

61158239 is a wasteful number, since it uses less digits than its factorization.

61158239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366384.

The product of its digits is 12960, while the sum is 35.

The square root of 61158239 is about 7820.3733286845. The cubic root of 61158239 is about 393.9898109487.

The spelling of 61158239 in words is "sixty-one million, one hundred fifty-eight thousand, two hundred thirty-nine".