1234909900225 has 27 divisors (see below), whose sum is σ = 1558095830947. Its totient is φ = 970925565680.

The previous prime is 1234909900219. The next prime is 1234909900249. The reversal of 1234909900225 is 5220099094321.

The square root of 1234909900225 is 1111265.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 444567564081 + 790342336144 = 666759^2 + 889012^2 .

It is not a de Polignac number, because 1234909900225 - 2¹³ = 1234909892033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 327821292 + ... + 327825058.

Almost surely, 2^{1234909900225} is an apocalyptic number.

1234909900225 is the 1111265-th square number.

1234909900225 is the 555633-rd centered octagonal number.

It is an amenable number.

1234909900225 is a deficient number, since it is larger than the sum of its proper divisors (323185930722).

1234909900225 is an frugal number, since it uses more digits than its factorization.

1234909900225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662 (or 3831 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 1234909900225 in words is "one trillion, two hundred thirty-four billion, nine hundred nine million, nine hundred thousand, two hundred twenty-five".