1240453521225 has 18 divisors (see below), whose sum is σ = 2221790085086. Its totient is φ = 661575211200.

The previous prime is 1240453521221. The next prime is 1240453521259. The reversal of 1240453521225 is 5221253540421.

1240453521225 is a `hidden beast` number, since 1 + 2 + 40 + 45 + 352 + 1 + 225 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 33854528016 + 1206598993209 = 183996^2 + 1098453^2 .

It is not a de Polignac number, because 1240453521225 - 2² = 1240453521221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240453521225.

It is not an unprimeable number, because it can be changed into a prime (1240453521221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2756563156 + ... + 2756563605.

Almost surely, 2^{1240453521225} is an apocalyptic number.

1240453521225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240453521225 is a deficient number, since it is larger than the sum of its proper divisors (981336563861).

1240453521225 is a wasteful number, since it uses less digits than its factorization.

1240453521225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5513126777 (or 5513126769 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 1240453521225 in words is "one trillion, two hundred forty billion, four hundred fifty-three million, five hundred twenty-one thousand, two hundred twenty-five".