1491937725 has 48 divisors (see below), whose sum is σ = 2538212544. Its totient is φ = 772800000.

The previous prime is 1491937723. The next prime is 1491937729. The reversal of 1491937725 is 5277391941.

It is not a de Polignac number, because 1491937725 - 2¹ = 1491937723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491937723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 770859 + ... + 772791.

It is an arithmetic number, because the mean of its divisors is an integer number (52879428).

Almost surely, 2^1491937725 is an apocalyptic number.

1491937725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1491937725 is a deficient number, since it is larger than the sum of its proper divisors (1046274819).

1491937725 is a wasteful number, since it uses less digits than its factorization.

1491937725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238 (or 2233 counting only the distinct ones).

The product of its digits is 476280, while the sum is 48.

The square root of 1491937725 is about 38625.6097039257. The cubic root of 1491937725 is about 1142.6596680193.

The spelling of 1491937725 in words is "one billion, four hundred ninety-one million, nine hundred thirty-seven thousand, seven hundred twenty-five".