7940252401 has 4 divisors (see below), whose sum is σ = 7943984100. Its totient is φ = 7936520704.

The previous prime is 7940252389. The next prime is 7940252417. The reversal of 7940252401 is 1042520497.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2103139600 + 5837112801 = 45860^2 + 76401^2 .

It is a cyclic number.

It is not a de Polignac number, because 7940252401 - 2²¹ = 7938155249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7940252701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1862656 + ... + 1866913.

It is an arithmetic number, because the mean of its divisors is an integer number (1985996025).

Almost surely, 2^7940252401 is an apocalyptic number.

It is an amenable number.

7940252401 is a deficient number, since it is larger than the sum of its proper divisors (3731699).

7940252401 is a wasteful number, since it uses less digits than its factorization.

7940252401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731698.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 7940252401 is about 89108.0939140772. The cubic root of 7940252401 is about 1995.0085866763.

Adding to 7940252401 its reverse (1042520497), we get a palindrome (8982772898).

The spelling of 7940252401 in words is "seven billion, nine hundred forty million, two hundred fifty-two thousand, four hundred one".