1129261540 has 36 divisors (see below), whose sum is σ = 2606639868. Its totient is φ = 410639680.

The previous prime is 1129261501. The next prime is 1129261559. The reversal of 1129261540 is 451629211.

It can be written as a sum of positive squares in 2 ways, for example, as 335036416 + 794225124 = 18304^2 + 28182^2 .

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, 230899 + ... + 235738.

It is an arithmetic number, because the mean of its divisors is an integer number (72406663).

Almost surely, 2^1129261540 is an apocalyptic number.

1129261540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1129261540 is an abundant number, since it is smaller than the sum of its proper divisors (1477378328).

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

1129261540 is a wasteful number, since it uses less digits than its factorization.

1129261540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466668 (or 466655 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1129261540 is about 33604.4869027932. The cubic root of 1129261540 is about 1041.3534953887.

The spelling of 1129261540 in words is "one billion, one hundred twenty-nine million, two hundred sixty-one thousand, five hundred forty".