61005247 has 2 divisors, whose sum is σ = 61005248. Its totient is φ = 61005246.

The previous prime is 61005211. The next prime is 61005251. The reversal of 61005247 is 74250016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61005247 - 2²³ = 52616639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61002247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502623 + 30502624.

It is an arithmetic number, because the mean of its divisors is an integer number (30502624).

Almost surely, 2^61005247 is an apocalyptic number.

61005247 is a deficient number, since it is larger than the sum of its proper divisors (1).

61005247 is an equidigital number, since it uses as much as digits as its factorization.

61005247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 61005247 is about 7810.5855734381. The cubic root of 61005247 is about 393.6610047630.

The spelling of 61005247 in words is "sixty-one million, five thousand, two hundred forty-seven".