1629641 has 8 divisors (see below), whose sum is σ = 1782144. Its totient is φ = 1481040.

The previous prime is 1629623. The next prime is 1629643. The reversal of 1629641 is 1469261.

1629641 is nontrivially palindromic in base 4.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1629641 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1629643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (222768).

2^1629641 is an apocalyptic number.

It is an amenable number.

1629641 is a deficient number, since it is larger than the sum of its proper divisors (152503).

1629641 is a wasteful number, since it uses less digits than its factorization.

1629641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its digits is 2592, while the sum is 29.

The square root of 1629641 is about 1276.5739304874. The cubic root of 1629641 is about 117.6785515347.

The spelling of 1629641 in words is "one million, six hundred twenty-nine thousand, six hundred forty-one".