1491012 has 36 divisors (see below), whose sum is σ = 3822000. Its totient is φ = 490032.

The previous prime is 1491001. The next prime is 1491013. The reversal of 1491012 is 2101941.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1491013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2739 + ... + 3237.

2^1491012 is an apocalyptic number.

1491012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911000).

1491012 is an abundant number, since it is smaller than the sum of its proper divisors (2330988).

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

1491012 is a wasteful number, since it uses less digits than its factorization.

1491012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1491012 is about 1221.0700225622. The cubic root of 1491012 is about 114.2423284722.

Adding to 1491012 its reverse (2101941), we get a palindrome (3592953).

The spelling of 1491012 in words is "one million, four hundred ninety-one thousand, twelve".