1662745 has 8 divisors (see below), whose sum is σ = 2280384. Its totient is φ = 1140144.

The previous prime is 1662737. The next prime is 1662751. The reversal of 1662745 is 5472661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1662745 - 2³ = 1662737 is a prime.

It is a super-3 number, since 3×1662745³ = 13791077733324430875, which contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

1662745 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23719 + ... + 23788.

It is an arithmetic number, because the mean of its divisors is an integer number (285048).

2^1662745 is an apocalyptic number.

It is an amenable number.

1662745 is a deficient number, since it is larger than the sum of its proper divisors (617639).

1662745 is an equidigital number, since it uses as much as digits as its factorization.

1662745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47519.

The product of its digits is 10080, while the sum is 31.

The square root of 1662745 is about 1289.4746992477. The cubic root of 1662745 is about 118.4700441173.

The spelling of 1662745 in words is "one million, six hundred sixty-two thousand, seven hundred forty-five".