1143261380 has 12 divisors (see below), whose sum is σ = 2400848940. Its totient is φ = 457304544.

The previous prime is 1143261367. The next prime is 1143261473. The reversal of 1143261380 is 831623411.

It can be written as a sum of positive squares in 2 ways, for example, as 323928004 + 819333376 = 17998^2 + 28624^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28581515 + ... + 28581554.

It is an arithmetic number, because the mean of its divisors is an integer number (200070745).

Almost surely, 2^1143261380 is an apocalyptic number.

1143261380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143261380 is an abundant number, since it is smaller than the sum of its proper divisors (1257587560).

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

1143261380 is a wasteful number, since it uses less digits than its factorization.

1143261380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57163078 (or 57163076 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1143261380 is about 33812.1484085232. The cubic root of 1143261380 is about 1045.6391715590.

Adding to 1143261380 its reverse (831623411), we get a palindrome (1974884791).

The spelling of 1143261380 in words is "one billion, one hundred forty-three million, two hundred sixty-one thousand, three hundred eighty".