1490991 has 4 divisors (see below), whose sum is σ = 1987992. Its totient is φ = 993992.

The previous prime is 1490969. The next prime is 1490999. The reversal of 1490991 is 1990941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1490991 - 2⁵ = 1490959 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1490999) 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, 248496 + ... + 248501.

It is an arithmetic number, because the mean of its divisors is an integer number (496998).

2^1490991 is an apocalyptic number.

1490991 is a deficient number, since it is larger than the sum of its proper divisors (497001).

1490991 is an equidigital number, since it uses as much as digits as its factorization.

1490991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497000.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1490991 is about 1221.0614235164. The cubic root of 1490991 is about 114.2417921250.

The spelling of 1490991 in words is "one million, four hundred ninety thousand, nine hundred ninety-one".