1139786461 has 16 divisors (see below), whose sum is σ = 1260661248. Its totient is φ = 1021834800.

The previous prime is 1139786447. The next prime is 1139786467. The reversal of 1139786461 is 1646879311.

It is a cyclic number.

It is not a de Polignac number, because 1139786461 - 2²⁹ = 602915549 is a prime.

It is a super-2 number, since 2×1139786461² = 2598226353357809042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139786467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 882226 + ... + 883516.

It is an arithmetic number, because the mean of its divisors is an integer number (78791328).

Almost surely, 2^1139786461 is an apocalyptic number.

1139786461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1139786461 is a deficient number, since it is larger than the sum of its proper divisors (120874787).

1139786461 is a wasteful number, since it uses less digits than its factorization.

1139786461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its digits is 217728, while the sum is 46.

The square root of 1139786461 is about 33760.7236444955. The cubic root of 1139786461 is about 1044.5786969541.

It can be divided in two parts, 11397864 and 61, that added together give a triangular number (11397925 = T₄₇₇₄).

The spelling of 1139786461 in words is "one billion, one hundred thirty-nine million, seven hundred eighty-six thousand, four hundred sixty-one".