61005049 has 6 divisors (see below), whose sum is σ = 70965114. Its totient is φ = 52290000.

The previous prime is 61005037. The next prime is 61005059. The reversal of 61005049 is 94050016.

It can be written as a sum of positive squares in only one way, i.e., 41925625 + 19079424 = 6475^2 + 4368^2 .

It is not a de Polignac number, because 61005049 - 2¹³ = 60996857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61005059) 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, 622452 + ... + 622549.

It is an arithmetic number, because the mean of its divisors is an integer number (11827519).

Almost surely, 2^61005049 is an apocalyptic number.

It is an amenable number.

61005049 is a deficient number, since it is larger than the sum of its proper divisors (9960065).

61005049 is a wasteful number, since it uses less digits than its factorization.

61005049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245015 (or 1245008 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 61005049 is about 7810.5728983219. The cubic root of 61005049 is about 393.6605788708.

The spelling of 61005049 in words is "sixty-one million, five thousand, forty-nine".