1491499 has 4 divisors (see below), whose sum is σ = 1542960. Its totient is φ = 1440040.

The previous prime is 1491493. The next prime is 1491509. The reversal of 1491499 is 9941941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9941941 = 127 ⋅78283.

It is a cyclic number.

It is not a de Polignac number, because 1491499 - 2³ = 1491491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1491491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25687 + ... + 25744.

It is an arithmetic number, because the mean of its divisors is an integer number (385740).

2^1491499 is an apocalyptic number.

1491499 is a deficient number, since it is larger than the sum of its proper divisors (51461).

1491499 is an equidigital number, since it uses as much as digits as its factorization.

1491499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51460.

The product of its digits is 11664, while the sum is 37.

The square root of 1491499 is about 1221.2694215446. The cubic root of 1491499 is about 114.2547652059.

It can be divided in two parts, 149149 and 9, that multiplied together give a triangular number (1342341 = T₁₆₃₈).

The spelling of 1491499 in words is "one million, four hundred ninety-one thousand, four hundred ninety-nine".