1001440401 has 32 divisors (see below), whose sum is σ = 1518676992. Its totient is φ = 582331200.

The previous prime is 1001440397. The next prime is 1001440411. The reversal of 1001440401 is 1040441001.

It is not a de Polignac number, because 1001440401 - 2² = 1001440397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001440411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67726 + ... + 81176.

It is an arithmetic number, because the mean of its divisors is an integer number (47458656).

Almost surely, 2^1001440401 is an apocalyptic number.

It is an amenable number.

1001440401 is a deficient number, since it is larger than the sum of its proper divisors (517236591).

1001440401 is a wasteful number, since it uses less digits than its factorization.

1001440401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13573.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1001440401 is about 31645.5431459155. The cubic root of 1001440401 is about 1000.4799033226.

Adding to 1001440401 its reverse (1040441001), we get a palindrome (2041881402).

The spelling of 1001440401 in words is "one billion, one million, four hundred forty thousand, four hundred one".