1491451 has 8 divisors (see below), whose sum is σ = 1641024. Its totient is φ = 1346880.

The previous prime is 1491449. The next prime is 1491491. The reversal of 1491451 is 1541941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1491451 - 2¹ = 1491449 is a prime.

It is a Duffinian number.

1491451 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1491401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (205128).

2^1491451 is an apocalyptic number.

1491451 is the 611-st decagonal number.

1491451 is a deficient number, since it is larger than the sum of its proper divisors (149573).

1491451 is a wasteful number, since it uses less digits than its factorization.

1491451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501.

The product of its digits is 720, while the sum is 25.

The square root of 1491451 is about 1221.2497697032. The cubic root of 1491451 is about 114.2535395290.

It can be divided in two parts, 149 and 1451, that added together give a square (1600 = 40²).

The spelling of 1491451 in words is "one million, four hundred ninety-one thousand, four hundred fifty-one".