1243011425 has 12 divisors (see below), whose sum is σ = 1608349440. Its totient is φ = 951173520.

The previous prime is 1243011421. The next prime is 1243011437. The reversal of 1243011425 is 5241103421.

It is not a de Polignac number, because 1243011425 - 2² = 1243011421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 1243011425.

It is not an unprimeable number, because it can be changed into a prime (1243011421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1080305 + ... + 1081454.

It is an arithmetic number, because the mean of its divisors is an integer number (134029120).

Almost surely, 2^1243011425 is an apocalyptic number.

It is an amenable number.

1243011425 is a deficient number, since it is larger than the sum of its proper divisors (365338015).

1243011425 is a wasteful number, since it uses less digits than its factorization.

1243011425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161792 (or 2161787 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1243011425 is about 35256.3671554515. The cubic root of 1243011425 is about 1075.2060683020.

Adding to 1243011425 its reverse (5241103421), we get a palindrome (6484114846).

The spelling of 1243011425 in words is "one billion, two hundred forty-three million, eleven thousand, four hundred twenty-five".