1213354025 has 12 divisors (see below), whose sum is σ = 1620294732. Its totient is φ = 896015040.

The previous prime is 1213354019. The next prime is 1213354033. The reversal of 1213354025 is 5204533121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 373107856 + 840246169 = 19316^2 + 28987^2 .

It is not a de Polignac number, because 1213354025 - 2⁶ = 1213353961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213353985 and 1213354003.

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, 1866374 + ... + 1867023.

It is an arithmetic number, because the mean of its divisors is an integer number (135024561).

Almost surely, 2^1213354025 is an apocalyptic number.

It is an amenable number.

1213354025 is a deficient number, since it is larger than the sum of its proper divisors (406940707).

1213354025 is a wasteful number, since it uses less digits than its factorization.

1213354025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733420 (or 3733415 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1213354025 is about 34833.2316186713. The cubic root of 1213354025 is about 1066.5859170100.

Adding to 1213354025 its reverse (5204533121), we get a palindrome (6417887146).

The spelling of 1213354025 in words is "one billion, two hundred thirteen million, three hundred fifty-four thousand, twenty-five".