61249165 has 4 divisors (see below), whose sum is σ = 73499004. Its totient is φ = 48999328.

The previous prime is 61249163. The next prime is 61249183. The reversal of 61249165 is 56194216.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27910089 + 33339076 = 5283^2 + 5774^2 .

It is a cyclic number.

It is not a de Polignac number, because 61249165 - 2¹ = 61249163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61249165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61249163) 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, 6124912 + ... + 6124921.

It is an arithmetic number, because the mean of its divisors is an integer number (18374751).

Almost surely, 2^61249165 is an apocalyptic number.

It is an amenable number.

61249165 is a deficient number, since it is larger than the sum of its proper divisors (12249839).

61249165 is a wasteful number, since it uses less digits than its factorization.

61249165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12249838.

The product of its digits is 12960, while the sum is 34.

The square root of 61249165 is about 7826.1845748743. The cubic root of 61249165 is about 394.1849668767.

The spelling of 61249165 in words is "sixty-one million, two hundred forty-nine thousand, one hundred sixty-five".