1623401 has 8 divisors (see below), whose sum is σ = 1761984. Its totient is φ = 1486800.

The previous prime is 1623367. The next prime is 1623403. The reversal of 1623401 is 1043261.

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

It is a cyclic number.

It is not a de Polignac number, because 1623401 - 2¹⁰ = 1622377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1623401.

It is not an unprimeable number, because it can be changed into a prime (1623403) 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, 1550 + ... + 2376.

It is an arithmetic number, because the mean of its divisors is an integer number (220248).

2^1623401 is an apocalyptic number.

It is an amenable number.

1623401 is a deficient number, since it is larger than the sum of its proper divisors (138583).

1623401 is a wasteful number, since it uses less digits than its factorization.

1623401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1623401 is about 1274.1275446359. The cubic root of 1623401 is about 117.5281598419.

Adding to 1623401 its reverse (1043261), we get a palindrome (2666662).

The spelling of 1623401 in words is "one million, six hundred twenty-three thousand, four hundred one".