1491655 has 16 divisors (see below), whose sum is σ = 2008224. Its totient is φ = 1054080.

The previous prime is 1491653. The next prime is 1491661. The reversal of 1491655 is 5561941.

It is not a de Polignac number, because 1491655 - 2¹ = 1491653 is a prime.

It is a super-4 number, since 4×1491655⁴ (a number of 26 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1669 + ... + 2401.

It is an arithmetic number, because the mean of its divisors is an integer number (125514).

2^1491655 is an apocalyptic number.

1491655 is a deficient number, since it is larger than the sum of its proper divisors (516569).

1491655 is a wasteful number, since it uses less digits than its factorization.

1491655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786.

The product of its digits is 5400, while the sum is 31.

The square root of 1491655 is about 1221.3332878457. Note that the first 3 decimals coincide. The cubic root of 1491655 is about 114.2587484742.

The spelling of 1491655 in words is "one million, four hundred ninety-one thousand, six hundred fifty-five".