1491453 has 10 divisors (see below), whose sum is σ = 2228094. Its totient is φ = 994248.

The previous prime is 1491449. The next prime is 1491491. The reversal of 1491453 is 3541941.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 363609 = 1062^2 + 603^2 .

It is not a de Polignac number, because 1491453 - 2² = 1491449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

1491453 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491403) 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 9 ways as a sum of consecutive naturals, for example, 9126 + ... + 9287.

2^1491453 is an apocalyptic number.

It is an amenable number.

1491453 is a deficient number, since it is larger than the sum of its proper divisors (736641).

1491453 is an equidigital number, since it uses as much as digits as its factorization.

1491453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425 (or 18416 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1491453 is about 1221.2505885362. The cubic root of 1491453 is about 114.2535905994.

The spelling of 1491453 in words is "one million, four hundred ninety-one thousand, four hundred fifty-three".