1263161250 has 160 divisors (see below), whose sum is σ = 3778790400. Its totient is φ = 310824000.

The previous prime is 1263161239. The next prime is 1263161279. The reversal of 1263161250 is 521613621.

1263161250 is a `hidden beast` number, since 1 + 2 + 631 + 6 + 1 + 25 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 437311 + ... + 440189.

It is an arithmetic number, because the mean of its divisors is an integer number (23617440).

Almost surely, 2^1263161250 is an apocalyptic number.

1263161250 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 1263161250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889395200).

1263161250 is an abundant number, since it is smaller than the sum of its proper divisors (2515629150).

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

1263161250 is a wasteful number, since it uses less digits than its factorization.

1263161250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923 (or 2902 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1263161250 is about 35540.9798683154. The cubic root of 1263161250 is about 1080.9848269947.

Adding to 1263161250 its reverse (521613621), we get a palindrome (1784774871).

The spelling of 1263161250 in words is "one billion, two hundred sixty-three million, one hundred sixty-one thousand, two hundred fifty".