1641427 has 4 divisors (see below), whose sum is σ = 1659960. Its totient is φ = 1622896.

The previous prime is 1641407. The next prime is 1641457. The reversal of 1641427 is 7241461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641407) 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 3 ways as a sum of consecutive naturals, for example, 9133 + ... + 9310.

It is an arithmetic number, because the mean of its divisors is an integer number (414990).

2^1641427 is an apocalyptic number.

1641427 is a deficient number, since it is larger than the sum of its proper divisors (18533).

1641427 is an equidigital number, since it uses as much as digits as its factorization.

1641427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18532.

The product of its digits is 1344, while the sum is 25.

The square root of 1641427 is about 1281.1818762377. The cubic root of 1641427 is about 117.9615646151.

Adding to 1641427 its reverse (7241461), we get a palindrome (8882888).

The spelling of 1641427 in words is "one million, six hundred forty-one thousand, four hundred twenty-seven".