1269057140 has 48 divisors (see below), whose sum is σ = 3038856912. Its totient is φ = 441010176.

The previous prime is 1269057091. The next prime is 1269057143. The reversal of 1269057140 is 417509621.

It can be written as a sum of positive squares in 8 ways, for example, as 191379556 + 1077677584 = 13834^2 + 32828^2 .

It is a super-2 number, since 2×1269057140² = 3221012049169959200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1269057140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269057143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139139 + ... + 147978.

It is an arithmetic number, because the mean of its divisors is an integer number (63309519).

Almost surely, 2^1269057140 is an apocalyptic number.

1269057140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1269057140 is an abundant number, since it is smaller than the sum of its proper divisors (1769799772).

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

1269057140 is a wasteful number, since it uses less digits than its factorization.

1269057140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287156 (or 287154 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1269057140 is about 35623.8282614320. The cubic root of 1269057140 is about 1082.6640734685.

The spelling of 1269057140 in words is "one billion, two hundred sixty-nine million, fifty-seven thousand, one hundred forty".