1491268207 has 16 divisors (see below), whose sum is σ = 1755186048. Its totient is φ = 1249123680.

The previous prime is 1491268151. The next prime is 1491268213. The reversal of 1491268207 is 7028621941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1491268207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1491268207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491268267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71248 + ... + 89770.

It is an arithmetic number, because the mean of its divisors is an integer number (109699128).

Almost surely, 2^1491268207 is an apocalyptic number.

1491268207 is a deficient number, since it is larger than the sum of its proper divisors (263917841).

1491268207 is a wasteful number, since it uses less digits than its factorization.

1491268207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19110.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1491268207 is about 38616.9419685195. The cubic root of 1491268207 is about 1142.4887168084.

The spelling of 1491268207 in words is "one billion, four hundred ninety-one million, two hundred sixty-eight thousand, two hundred seven".