45420247 has 2 divisors, whose sum is σ = 45420248. Its totient is φ = 45420246.

The previous prime is 45420229. The next prime is 45420269. The reversal of 45420247 is 74202454.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45420247 - 2¹⁵ = 45387479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45420647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22710123 + 22710124.

It is an arithmetic number, because the mean of its divisors is an integer number (22710124).

Almost surely, 2^45420247 is an apocalyptic number.

45420247 is a deficient number, since it is larger than the sum of its proper divisors (1).

45420247 is an equidigital number, since it uses as much as digits as its factorization.

45420247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 28.

The square root of 45420247 is about 6739.4545031479. The cubic root of 45420247 is about 356.7931412570.

The spelling of 45420247 in words is "forty-five million, four hundred twenty thousand, two hundred forty-seven".