1213400025 has 36 divisors (see below), whose sum is σ = 2175329520. Its totient is φ = 646552800.

The previous prime is 1213400017. The next prime is 1213400033. The reversal of 1213400025 is 5200043121.

It is an interprime number because it is at equal distance from previous prime (1213400017) and next prime (1213400033).

It is not a de Polignac number, because 1213400025 - 2³ = 1213400017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213399980 and 1213400007.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 362610 + ... + 365940.

It is an arithmetic number, because the mean of its divisors is an integer number (60425820).

Almost surely, 2^1213400025 is an apocalyptic number.

1213400025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213400025 is a deficient number, since it is larger than the sum of its proper divisors (961929495).

1213400025 is a wasteful number, since it uses less digits than its factorization.

1213400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1213400025 is about 34833.8919014227. The cubic root of 1213400025 is about 1066.5993954428.

Adding to 1213400025 its reverse (5200043121), we get a palindrome (6413443146).

The spelling of 1213400025 in words is "one billion, two hundred thirteen million, four hundred thousand, twenty-five".