61148247 has 4 divisors (see below), whose sum is σ = 81531000. Its totient is φ = 40765496.

The previous prime is 61148233. The next prime is 61148257. The reversal of 61148247 is 74284116.

61148247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61148247 - 2⁶ = 61148183 is a prime.

It is a super-2 number, since 2×61148247² = 7478216222346018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61148257) 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 3 ways as a sum of consecutive naturals, for example, 10191372 + ... + 10191377.

It is an arithmetic number, because the mean of its divisors is an integer number (20382750).

Almost surely, 2^61148247 is an apocalyptic number.

61148247 is a deficient number, since it is larger than the sum of its proper divisors (20382753).

61148247 is a wasteful number, since it uses less digits than its factorization.

61148247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20382752.

The product of its digits is 10752, while the sum is 33.

The square root of 61148247 is about 7819.7344584071. The cubic root of 61148247 is about 393.9683531660.

The spelling of 61148247 in words is "sixty-one million, one hundred forty-eight thousand, two hundred forty-seven".