1401824 has 24 divisors (see below), whose sum is σ = 2803248. Its totient is φ = 689920.

The previous prime is 1401823. The next prime is 1401857. The reversal of 1401824 is 4281041.

It is a super-2 number, since 2×1401824² = 3930221053952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1401796 and 1401805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1964 + ... + 2580.

It is an arithmetic number, because the mean of its divisors is an integer number (116802).

2^1401824 is an apocalyptic number.

It is an amenable number.

1401824 is a deficient number, since it is larger than the sum of its proper divisors (1401424).

1401824 is an equidigital number, since it uses as much as digits as its factorization.

1401824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1401824 is about 1183.9864864094. The cubic root of 1401824 is about 111.9174561871.

Adding to 1401824 its reverse (4281041), we get a palindrome (5682865).

The spelling of 1401824 in words is "one million, four hundred one thousand, eight hundred twenty-four".