1275250100 has 36 divisors (see below), whose sum is σ = 2856567168. Its totient is φ = 493644000.

The previous prime is 1275250057. The next prime is 1275250133. The reversal of 1275250100 is 10525721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202586 + ... + 208785.

It is an arithmetic number, because the mean of its divisors is an integer number (79349088).

Almost surely, 2^1275250100 is an apocalyptic number.

1275250100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275250100 is an abundant number, since it is smaller than the sum of its proper divisors (1581317068).

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

1275250100 is a wasteful number, since it uses less digits than its factorization.

1275250100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411416 (or 411409 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 1275250100 is about 35710.6440714810. The cubic root of 1275250100 is about 1084.4223389821.

Adding to 1275250100 its reverse (10525721), we get a palindrome (1285775821).

The spelling of 1275250100 in words is "one billion, two hundred seventy-five million, two hundred fifty thousand, one hundred".