1491623 has 8 divisors (see below), whose sum is σ = 1712160. Its totient is φ = 1272960.

The previous prime is 1491601. The next prime is 1491629. The reversal of 1491623 is 3261941.

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 1491623 - 2¹² = 1487527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1491592 and 1491601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2603 + ... + 3123.

It is an arithmetic number, because the mean of its divisors is an integer number (214020).

2^1491623 is an apocalyptic number.

1491623 is a deficient number, since it is larger than the sum of its proper divisors (220537).

1491623 is an equidigital number, since it uses as much as digits as its factorization.

1491623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937.

The product of its digits is 1296, while the sum is 26.

The square root of 1491623 is about 1221.3201873383. The cubic root of 1491623 is about 114.2579314162.

The spelling of 1491623 in words is "one million, four hundred ninety-one thousand, six hundred twenty-three".