40401001 has 2 divisors, whose sum is σ = 40401002. Its totient is φ = 40401000.

The previous prime is 40400977. The next prime is 40401013. The reversal of 40401001 is 10010404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 18498601 = 4680^2 + 4301^2 .

It is a cyclic number.

It is not a de Polignac number, because 40401001 - 2²¹ = 38303849 is a prime.

It is not a weakly prime, because it can be changed into another prime (40401071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200500 + 20200501.

It is an arithmetic number, because the mean of its divisors is an integer number (20200501).

Almost surely, 2^40401001 is an apocalyptic number.

It is an amenable number.

40401001 is a deficient number, since it is larger than the sum of its proper divisors (1).

40401001 is an equidigital number, since it uses as much as digits as its factorization.

40401001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 40401001 is about 6356.1781756021. The cubic root of 40401001 is about 343.1342282492.

Adding to 40401001 its reverse (10010404), we get a palindrome (50411405).

It can be divided in two parts, 4040 and 1001, that added together give a square (5041 = 71²).

The spelling of 40401001 in words is "forty million, four hundred one thousand, one".