1401641 has 2 divisors, whose sum is σ = 1401642. Its totient is φ = 1401640.

The previous prime is 1401629. The next prime is 1401679. The reversal of 1401641 is 1461041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 246016 = 1075^2 + 496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401641 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1401601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700820 + 700821.

It is an arithmetic number, because the mean of its divisors is an integer number (700821).

2^1401641 is an apocalyptic number.

It is an amenable number.

1401641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401641 is an equidigital number, since it uses as much as digits as its factorization.

1401641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1401641 is about 1183.9092025996. The cubic root of 1401641 is about 111.9125859167.

Adding to 1401641 its reverse (1461041), we get a palindrome (2862682).

The spelling of 1401641 in words is "one million, four hundred one thousand, six hundred forty-one".