3661247 has 2 divisors, whose sum is σ = 3661248. Its totient is φ = 3661246.

The previous prime is 3661211. The next prime is 3661249. The reversal of 3661247 is 7421663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3661247 - 2¹² = 3657151 is a prime.

Together with 3661249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3661249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830623 + 1830624.

It is an arithmetic number, because the mean of its divisors is an integer number (1830624).

Almost surely, 2^3661247 is an apocalyptic number.

3661247 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661247 is an equidigital number, since it uses as much as digits as its factorization.

3661247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 3661247 is about 1913.4385278864. The cubic root of 3661247 is about 154.1261545690.

The spelling of 3661247 in words is "three million, six hundred sixty-one thousand, two hundred forty-seven".