1243213025 has 12 divisors (see below), whose sum is σ = 1542651264. Its totient is φ = 993882000.

The previous prime is 1243213019. The next prime is 1243213063. The reversal of 1243213025 is 5203123421.

It is a de Polignac number, because none of the positive numbers 2^k-1243213025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21320 + ... + 54230.

It is an arithmetic number, because the mean of its divisors is an integer number (128554272).

Almost surely, 2^1243213025 is an apocalyptic number.

It is an amenable number.

1243213025 is a deficient number, since it is larger than the sum of its proper divisors (299438239).

1243213025 is a wasteful number, since it uses less digits than its factorization.

1243213025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34432 (or 34427 counting only the distinct ones).

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

The square root of 1243213025 is about 35259.2260975762. The cubic root of 1243213025 is about 1075.2641932238.

Adding to 1243213025 its reverse (5203123421), we get a palindrome (6446336446).

The spelling of 1243213025 in words is "one billion, two hundred forty-three million, two hundred thirteen thousand, twenty-five".