1642641 has 32 divisors (see below), whose sum is σ = 2946048. Its totient is φ = 786240.

The previous prime is 1642633. The next prime is 1642649. The reversal of 1642641 is 1462461.

It is an interprime number because it is at equal distance from previous prime (1642633) and next prime (1642649).

It is not a de Polignac number, because 1642641 - 2³ = 1642633 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2730 + ... + 3276.

It is an arithmetic number, because the mean of its divisors is an integer number (92064).

2^1642641 is an apocalyptic number.

1642641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1642641 is a deficient number, since it is larger than the sum of its proper divisors (1303407).

1642641 is a wasteful number, since it uses less digits than its factorization.

1642641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its digits is 1152, while the sum is 24.

The square root of 1642641 is about 1281.6555699563. The cubic root of 1642641 is about 117.9906389203.

The spelling of 1642641 in words is "one million, six hundred forty-two thousand, six hundred forty-one".