1491087 has 24 divisors (see below), whose sum is σ = 2292624. Its totient is φ = 858624.

The previous prime is 1491079. The next prime is 1491097. The reversal of 1491087 is 7801941.

It is not a de Polignac number, because 1491087 - 2³ = 1491079 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8533 + ... + 8705.

It is an arithmetic number, because the mean of its divisors is an integer number (95526).

2^1491087 is an apocalyptic number.

1491087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1491087 is a deficient number, since it is larger than the sum of its proper divisors (801537).

1491087 is a wasteful number, since it uses less digits than its factorization.

1491087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1491087 is about 1221.1007329455. The cubic root of 1491087 is about 114.2442439566.

The spelling of 1491087 in words is "one million, four hundred ninety-one thousand, eighty-seven".