61506247 has 8 divisors (see below), whose sum is σ = 68911632. Its totient is φ = 54403200.

The previous prime is 61506217. The next prime is 61506253. The reversal of 61506247 is 74260516.

It is a happy number.

61506247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61506247 - 2¹¹ = 61504199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75154 + ... + 75967.

It is an arithmetic number, because the mean of its divisors is an integer number (8613954).

Almost surely, 2^61506247 is an apocalyptic number.

61506247 is a deficient number, since it is larger than the sum of its proper divisors (7405385).

61506247 is a wasteful number, since it uses less digits than its factorization.

61506247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151169.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 61506247 is about 7842.5918547378. The cubic root of 61506247 is about 394.7357031306.

The spelling of 61506247 in words is "sixty-one million, five hundred six thousand, two hundred forty-seven".