1491994 has 32 divisors (see below), whose sum is σ = 2764800. Its totient is φ = 589680.

The previous prime is 1491991. The next prime is 1492009. The reversal of 1491994 is 4991941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18847 + ... + 18925.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2^1491994 is an apocalyptic number.

1491994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1491994 is a deficient number, since it is larger than the sum of its proper divisors (1272806).

1491994 is a wasteful number, since it uses less digits than its factorization.

1491994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178.

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

The square root of 1491994 is about 1221.4720627178. The cubic root of 1491994 is about 114.2674034652.

Multiplying 1491994 by its sum of digits (37), we get a triangular number (55203778 = T₁₀₅₀₇).

It can be divided in two parts, 1491 and 994, that added together give a triangular number (2485 = T₇₀).

The spelling of 1491994 in words is "one million, four hundred ninety-one thousand, nine hundred ninety-four".