1275204100 has 27 divisors (see below), whose sum is σ = 2767968021. Its totient is φ = 509938800.

The previous prime is 1275204089. The next prime is 1275204101. The reversal of 1275204100 is 14025721.

It is a happy number.

The square root of 1275204100 is 35710.

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., 459073476 + 816130624 = 21426^2 + 28568^2 .

It is a super-2 number, since 2×1275204100² = 3252290993313620000, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275204101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 355315 + ... + 358885.

Almost surely, 2^1275204100 is an apocalyptic number.

1275204100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1275204100 is the 35710-th square number.

It is an amenable number.

1275204100 is an abundant number, since it is smaller than the sum of its proper divisors (1492763921).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275204100 is an frugal number, since it uses more digits than its factorization.

1275204100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156 (or 3578 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The cubic root of 1275204100 is about 1084.4092999640.

Adding to 1275204100 its reverse (14025721), we get a palindrome (1289229821).

The spelling of 1275204100 in words is "one billion, two hundred seventy-five million, two hundred four thousand, one hundred".