1234825681 has 4 divisors (see below), whose sum is σ = 1252217664. Its totient is φ = 1217433700.

The previous prime is 1234825661. The next prime is 1234825687. The reversal of 1234825681 is 1865284321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1234825681 - 2⁵ = 1234825649 is a prime.

It is a super-2 number, since 2×1234825681² = 3049588924914227522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1234825687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8695885 + ... + 8696026.

It is an arithmetic number, because the mean of its divisors is an integer number (313054416).

Almost surely, 2^1234825681 is an apocalyptic number.

It is an amenable number.

1234825681 is a deficient number, since it is larger than the sum of its proper divisors (17391983).

1234825681 is an equidigital number, since it uses as much as digits as its factorization.

1234825681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17391982.

The product of its digits is 92160, while the sum is 40.

The square root of 1234825681 is about 35140.0865252207. The cubic root of 1234825681 is about 1072.8406427871.

The spelling of 1234825681 in words is "one billion, two hundred thirty-four million, eight hundred twenty-five thousand, six hundred eighty-one".