1491137524 has 12 divisors (see below), whose sum is σ = 2762990244. Its totient is φ = 701711744.

The previous prime is 1491137521. The next prime is 1491137539. The reversal of 1491137524 is 4257311941.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 947408400 + 543729124 = 30780^2 + 23318^2 .

It is a super-2 number, since 2×1491137524² = 4446982230961701152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491137521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10964179 + ... + 10964314.

It is an arithmetic number, because the mean of its divisors is an integer number (230249187).

Almost surely, 2^1491137524 is an apocalyptic number.

It is an amenable number.

1491137524 is a deficient number, since it is larger than the sum of its proper divisors (1271852720).

1491137524 is a wasteful number, since it uses less digits than its factorization.

1491137524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21928514 (or 21928512 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 1491137524 is about 38615.2498891306. The cubic root of 1491137524 is about 1142.4553429294.

The spelling of 1491137524 in words is "one billion, four hundred ninety-one million, one hundred thirty-seven thousand, five hundred twenty-four".