1275629250 has 192 divisors, whose sum is σ = 3750859008. Its totient is φ = 287884800.

The previous prime is 1275629233. The next prime is 1275629263. The reversal of 1275629250 is 529265721.

It is a junction number, because it is equal to n+sod(n) for n = 1275629199 and 1275629208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3785082 + ... + 3785418.

It is an arithmetic number, because the mean of its divisors is an integer number (19535724).

Almost surely, 2^1275629250 is an apocalyptic number.

1275629250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275629250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875429504).

1275629250 is an abundant number, since it is smaller than the sum of its proper divisors (2475229758).

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

1275629250 is a wasteful number, since it uses less digits than its factorization.

1275629250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1275629250 is about 35715.9523182569. The cubic root of 1275629250 is about 1084.5297997300.

The spelling of 1275629250 in words is "one billion, two hundred seventy-five million, six hundred twenty-nine thousand, two hundred fifty".