1139541481 has 12 divisors (see below), whose sum is σ = 1245282060. Its totient is φ = 1042217280.

The previous prime is 1139541451. The next prime is 1139541521. The reversal of 1139541481 is 1841459311.

It can be written as a sum of positive squares in 6 ways, for example, as 124545600 + 1014995881 = 11160^2 + 31859^2 .

It is not a de Polignac number, because 1139541481 - 2⁵ = 1139541449 is a prime.

It is a super-2 number, since 2×1139541481² = 2597109573839346722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1139541481.

It is not an unprimeable number, because it can be changed into a prime (1139541451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12510 + ... + 49351.

It is an arithmetic number, because the mean of its divisors is an integer number (103773505).

Almost surely, 2^1139541481 is an apocalyptic number.

It is an amenable number.

1139541481 is a deficient number, since it is larger than the sum of its proper divisors (105740579).

1139541481 is a wasteful number, since it uses less digits than its factorization.

1139541481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61996 (or 61983 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 1139541481 is about 33757.0952689949. The cubic root of 1139541481 is about 1044.5038527518.

The spelling of 1139541481 in words is "one billion, one hundred thirty-nine million, five hundred forty-one thousand, four hundred eighty-one".