1491749 has 8 divisors (see below), whose sum is σ = 1722240. Its totient is φ = 1265616.

The previous prime is 1491739. The next prime is 1491761. The reversal of 1491749 is 9471941.

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 1491749 - 2⁸ = 1491493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314 + ... + 1755.

It is an arithmetic number, because the mean of its divisors is an integer number (215280).

2^1491749 is an apocalyptic number.

It is an amenable number.

1491749 is a deficient number, since it is larger than the sum of its proper divisors (230491).

1491749 is a wasteful number, since it uses less digits than its factorization.

1491749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179.

The product of its digits is 9072, while the sum is 35.

The square root of 1491749 is about 1221.3717697736. The cubic root of 1491749 is about 114.2611485146.

The spelling of 1491749 in words is "one million, four hundred ninety-one thousand, seven hundred forty-nine".