1491054069 has 16 divisors (see below), whose sum is σ = 2001827520. Its totient is φ = 987173760.

The previous prime is 1491054067. The next prime is 1491054079. The reversal of 1491054069 is 9604501941.

It is not a de Polignac number, because 1491054069 - 2¹ = 1491054067 is a prime.

It is a super-4 number, since 4×1491054069⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491054067) 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, 568449 + ... + 571065.

It is an arithmetic number, because the mean of its divisors is an integer number (125114220).

Almost surely, 2^1491054069 is an apocalyptic number.

It is an amenable number.

1491054069 is a deficient number, since it is larger than the sum of its proper divisors (510773451).

1491054069 is a wasteful number, since it uses less digits than its factorization.

1491054069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1491054069 is about 38614.1692776110. The cubic root of 1491054069 is about 1142.4340291364.

The spelling of 1491054069 in words is "one billion, four hundred ninety-one million, fifty-four thousand, sixty-nine".