1243230125 has 8 divisors (see below), whose sum is σ = 1551551352. Its totient is φ = 994584000.

The previous prime is 1243230119. The next prime is 1243230137. The reversal of 1243230125 is 5210323421.

It can be written as a sum of positive squares in 4 ways, for example, as 79192201 + 1164037924 = 8899^2 + 34118^2 .

It is not a de Polignac number, because 1243230125 - 2¹² = 1243226029 is a prime.

It is a super-2 number, since 2×1243230125² = 3091242287415031250, which contains 22 as substring.

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 1243230125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4972796 + ... + 4973045.

It is an arithmetic number, because the mean of its divisors is an integer number (193943919).

Almost surely, 2^1243230125 is an apocalyptic number.

It is an amenable number.

1243230125 is a deficient number, since it is larger than the sum of its proper divisors (308321227).

1243230125 is an frugal number, since it uses more digits than its factorization.

1243230125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9945856 (or 9945846 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1243230125 is about 35259.4685864662. The cubic root of 1243230125 is about 1075.2691231736.

Adding to 1243230125 its reverse (5210323421), we get a palindrome (6453553546).

The spelling of 1243230125 in words is "one billion, two hundred forty-three million, two hundred thirty thousand, one hundred twenty-five".