1662490 has 16 divisors (see below), whose sum is σ = 3030048. Its totient is φ = 656656.

The previous prime is 1662487. The next prime is 1662491. The reversal of 1662490 is 942661.

It is not an unprimeable number, because it can be changed into a prime (1662491) 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 7 ways as a sum of consecutive naturals, for example, 172 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (189378).

2^1662490 is an apocalyptic number.

1662490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1662490 is a deficient number, since it is larger than the sum of its proper divisors (1367558).

1662490 is a wasteful number, since it uses less digits than its factorization.

1662490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1662490 is about 1289.3758179833. The cubic root of 1662490 is about 118.4639875851.

The spelling of 1662490 in words is "one million, six hundred sixty-two thousand, four hundred ninety".