1631662 has 4 divisors (see below), whose sum is σ = 2447496. Its totient is φ = 815830.

The previous prime is 1631659. The next prime is 1631683. The reversal of 1631662 is 2661361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2661361 = 73 ⋅36457.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407914 + ... + 407917.

It is an arithmetic number, because the mean of its divisors is an integer number (611874).

2^1631662 is an apocalyptic number.

1631662 is a deficient number, since it is larger than the sum of its proper divisors (815834).

1631662 is an equidigital number, since it uses as much as digits as its factorization.

1631662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815833.

The product of its digits is 1296, while the sum is 25.

The square root of 1631662 is about 1277.3652570819. The cubic root of 1631662 is about 117.7271778080.

The spelling of 1631662 in words is "one million, six hundred thirty-one thousand, six hundred sixty-two".