1236145025 has 24 divisors (see below), whose sum is σ = 1579966584. Its totient is φ = 958694400.

The previous prime is 1236145013. The next prime is 1236145063. The reversal of 1236145025 is 5205416321.

It can be written as a sum of positive squares in 12 ways, for example, as 16459249 + 1219685776 = 4057^2 + 34924^2 .

It is not a de Polignac number, because 1236145025 - 2²⁸ = 967709569 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 268745 + ... + 273305.

It is an arithmetic number, because the mean of its divisors is an integer number (65831941).

Almost surely, 2^1236145025 is an apocalyptic number.

It is an amenable number.

1236145025 is a deficient number, since it is larger than the sum of its proper divisors (343821559).

1236145025 is a wasteful number, since it uses less digits than its factorization.

1236145025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4901 (or 4896 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1236145025 is about 35158.8541479952. The cubic root of 1236145025 is about 1073.2225973893. Note that the first 3 decimals are identical.

The spelling of 1236145025 in words is "one billion, two hundred thirty-six million, one hundred forty-five thousand, twenty-five".