1491825545 has 16 divisors (see below), whose sum is σ = 2046869760. Its totient is φ = 1022497344.

The previous prime is 1491825541. The next prime is 1491825547. The reversal of 1491825545 is 5455281941.

It is a cyclic number.

It is not a de Polignac number, because 1491825545 - 2² = 1491825541 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1491825496 and 1491825505.

It is not an unprimeable number, because it can be changed into a prime (1491825541) 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 15 ways as a sum of consecutive naturals, for example, 79091 + ... + 96119.

It is an arithmetic number, because the mean of its divisors is an integer number (127929360).

Almost surely, 2^1491825545 is an apocalyptic number.

It is an amenable number.

1491825545 is a deficient number, since it is larger than the sum of its proper divisors (555044215).

1491825545 is a wasteful number, since it uses less digits than its factorization.

1491825545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19544.

The product of its digits is 288000, while the sum is 44.

The square root of 1491825545 is about 38624.1575312653. The cubic root of 1491825545 is about 1142.6310281344.

The spelling of 1491825545 in words is "one billion, four hundred ninety-one million, eight hundred twenty-five thousand, five hundred forty-five".