1491125471 has 12 divisors (see below), whose sum is σ = 1735420176. Its totient is φ = 1275827520.

The previous prime is 1491125459. The next prime is 1491125473. The reversal of 1491125471 is 1745211941.

It is a de Polignac number, because none of the positive numbers 2^k-1491125471 is a prime.

It is a super-3 number, since 3×1491125471³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491125473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360395 + ... + 364508.

It is an arithmetic number, because the mean of its divisors is an integer number (144618348).

Almost surely, 2^1491125471 is an apocalyptic number.

1491125471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1491125471 is a deficient number, since it is larger than the sum of its proper divisors (244294705).

1491125471 is a wasteful number, since it uses less digits than its factorization.

1491125471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724942 (or 724931 counting only the distinct ones).

The product of its digits is 10080, while the sum is 35.

The square root of 1491125471 is about 38615.0938235297. The cubic root of 1491125471 is about 1142.4522647310.

The spelling of 1491125471 in words is "one billion, four hundred ninety-one million, one hundred twenty-five thousand, four hundred seventy-one".