1239110401 has 3 divisors (see below), whose sum is σ = 1239145603. Its totient is φ = 1239075200.

The previous prime is 1239110387. The next prime is 1239110437. The reversal of 1239110401 is 1040119321.

The square root of 1239110401 is 35201.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1040119321 = 37 ⋅28111333.

It can be written as a sum of positive squares in only one way, i.e., 715616001 + 523494400 = 26751^2 + 22880^2 .

It is not a de Polignac number, because 1239110401 - 2⁷ = 1239110273 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239110101) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17601 + ... + 52801.

Almost surely, 2^1239110401 is an apocalyptic number.

1239110401 is the 35201-st square number.

1239110401 is the 17601-st centered octagonal number.

It is an amenable number.

1239110401 is a deficient number, since it is larger than the sum of its proper divisors (35202).

1239110401 is an frugal number, since it uses more digits than its factorization.

1239110401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70402 (or 35201 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The cubic root of 1239110401 is about 1074.0800930783.

Adding to 1239110401 its reverse (1040119321), we get a palindrome (2279229722).

The spelling of 1239110401 in words is "one billion, two hundred thirty-nine million, one hundred ten thousand, four hundred one".