1215054267025 has 27 divisors (see below), whose sum is σ = 1513112052913. Its totient is φ = 967903193600.

The previous prime is 1215054267023. The next prime is 1215054267041. The reversal of 1215054267025 is 5207624505121.

It is a happy number.

The square root of 1215054267025 is 1102295.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1082212609 + 1213972054416 = 32897^2 + 1101804^2 .

It is not a de Polignac number, because 1215054267025 - 2¹ = 1215054267023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215054267023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2474652030 + ... + 2474652520.

Almost surely, 2^{1215054267025} is an apocalyptic number.

1215054267025 is the 1102295-th square number.

1215054267025 is the 551148-th centered octagonal number.

It is an amenable number.

1215054267025 is a deficient number, since it is larger than the sum of its proper divisors (298057785888).

1215054267025 is an frugal number, since it uses more digits than its factorization.

1215054267025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 1215054267025 in words is "one trillion, two hundred fifteen billion, fifty-four million, two hundred sixty-seven thousand, twenty-five".