1213269825 has 24 divisors (see below), whose sum is σ = 2011665888. Its totient is φ = 645230080.

The previous prime is 1213269823. The next prime is 1213269859. The reversal of 1213269825 is 5289623121.

It is not a de Polignac number, because 1213269825 - 2¹ = 1213269823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213269823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3562 + ... + 49388.

It is an arithmetic number, because the mean of its divisors is an integer number (83819412).

Almost surely, 2^1213269825 is an apocalyptic number.

1213269825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213269825 is a deficient number, since it is larger than the sum of its proper divisors (798396063).

1213269825 is a wasteful number, since it uses less digits than its factorization.

1213269825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46193 (or 46188 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 1213269825 is about 34832.0229817333. The cubic root of 1213269825 is about 1066.5612447353.

The spelling of 1213269825 in words is "one billion, two hundred thirteen million, two hundred sixty-nine thousand, eight hundred twenty-five".