1642481 has 2 divisors, whose sum is σ = 1642482. Its totient is φ = 1642480.

The previous prime is 1642463. The next prime is 1642483. The reversal of 1642481 is 1842461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1540081 + 102400 = 1241^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642481 - 2¹⁰ = 1641457 is a prime.

It is a super-2 number, since 2×1642481² = 5395487670722, which contains 22 as substring.

Together with 1642483, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642481.

It is not a weakly prime, because it can be changed into another prime (1642483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821240 + 821241.

It is an arithmetic number, because the mean of its divisors is an integer number (821241).

2^1642481 is an apocalyptic number.

It is an amenable number.

1642481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642481 is an equidigital number, since it uses as much as digits as its factorization.

1642481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 26.

The square root of 1642481 is about 1281.5931491702. The cubic root of 1642481 is about 117.9868078712.

The spelling of 1642481 in words is "one million, six hundred forty-two thousand, four hundred eighty-one".