1456991 has 4 divisors (see below), whose sum is σ = 1477584. Its totient is φ = 1436400.

The previous prime is 1456963. The next prime is 1457011. The reversal of 1456991 is 1996541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1996541 = 613 ⋅3257.

It is a cyclic number.

It is not a de Polignac number, because 1456991 - 2⁶ = 1456927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1456921) 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, 10190 + ... + 10331.

It is an arithmetic number, because the mean of its divisors is an integer number (369396).

2^1456991 is an apocalyptic number.

1456991 is a deficient number, since it is larger than the sum of its proper divisors (20593).

1456991 is an equidigital number, since it uses as much as digits as its factorization.

1456991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20592.

The product of its digits is 9720, while the sum is 35.

The square root of 1456991 is about 1207.0588220961. The cubic root of 1456991 is about 113.3667308340.

The spelling of 1456991 in words is "one million, four hundred fifty-six thousand, nine hundred ninety-one".