1401424 has 10 divisors (see below), whose sum is σ = 2715290. Its totient is φ = 700704.

The previous prime is 1401409. The next prime is 1401437. The reversal of 1401424 is 4241041.

It can be written as a sum of positive squares in only one way, i.e., 1065024 + 336400 = 1032^2 + 580^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 87589 = 1401424 / (1 + 4 + 0 + 1 + 4 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 1401398 and 1401407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43779 + ... + 43810.

It is an arithmetic number, because the mean of its divisors is an integer number (271529).

2^1401424 is an apocalyptic number.

It is an amenable number.

1401424 is a deficient number, since it is larger than the sum of its proper divisors (1313866).

1401424 is an equidigital number, since it uses as much as digits as its factorization.

1401424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87597 (or 87591 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1401424 is about 1183.8175535107. The cubic root of 1401424 is about 111.9068102379.

Adding to 1401424 its reverse (4241041), we get a palindrome (5642465).

The spelling of 1401424 in words is "one million, four hundred one thousand, four hundred twenty-four".