1401624 has 96 divisors (see below), whose sum is σ = 4542720. Its totient is φ = 396576.

The previous prime is 1401623. The next prime is 1401629. The reversal of 1401624 is 4261041.

1401624 is a `hidden beast` number, since 1 + 40 + 1 + 624 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1401597 and 1401606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13557 + ... + 13659.

It is an arithmetic number, because the mean of its divisors is an integer number (47320).

2^1401624 is an apocalyptic number.

1401624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2271360).

1401624 is an abundant number, since it is smaller than the sum of its proper divisors (3141096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1401624 is a wasteful number, since it uses less digits than its factorization.

1401624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1401624 is about 1183.9020229732. The cubic root of 1401624 is about 111.9121334657.

Adding to 1401624 its reverse (4261041), we get a palindrome (5662665).

It can be divided in two parts, 1401 and 624, that added together give a square (2025 = 45²).

The spelling of 1401624 in words is "one million, four hundred one thousand, six hundred twenty-four".