1491864 has 32 divisors (see below), whose sum is σ = 4069440. Its totient is φ = 452000.

The previous prime is 1491863. The next prime is 1491911. The reversal of 1491864 is 4681941.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491863) 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, 2562 + ... + 3089.

It is an arithmetic number, because the mean of its divisors is an integer number (127170).

2^1491864 is an apocalyptic number.

It is an amenable number.

1491864 is an abundant number, since it is smaller than the sum of its proper divisors (2577576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1491864 is a wasteful number, since it uses less digits than its factorization.

1491864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671 (or 5667 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1491864 is about 1221.4188470791. The cubic root of 1491864 is about 114.2640845971.

The spelling of 1491864 in words is "one million, four hundred ninety-one thousand, eight hundred sixty-four".