1240320401 has 8 divisors (see below), whose sum is σ = 1317769320. Its totient is φ = 1165183488.

The previous prime is 1240320383. The next prime is 1240320413. The reversal of 1240320401 is 1040230421.

It can be written as a sum of positive squares in 4 ways, for example, as 296356225 + 943964176 = 17215^2 + 30724^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240320401 - 2²⁶ = 1173211537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240320401.

It is not an unprimeable number, because it can be changed into a prime (1240320421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576896 + ... + 579041.

It is an arithmetic number, because the mean of its divisors is an integer number (164721165).

Almost surely, 2^1240320401 is an apocalyptic number.

It is an amenable number.

1240320401 is a deficient number, since it is larger than the sum of its proper divisors (77448919).

1240320401 is a wasteful number, since it uses less digits than its factorization.

1240320401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156003.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1240320401 is about 35218.1828179706. The cubic root of 1240320401 is about 1074.4295949214.

Adding to 1240320401 its reverse (1040230421), we get a palindrome (2280550822).

The spelling of 1240320401 in words is "one billion, two hundred forty million, three hundred twenty thousand, four hundred one".