1081499139 has 72 divisors (see below), whose sum is σ = 1889372160. Its totient is φ = 593762400.

The previous prime is 1081499129. The next prime is 1081499141. The reversal of 1081499139 is 9319941801.

It is not a de Polignac number, because 1081499139 - 2⁸ = 1081498883 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1081499094 and 1081499103.

It is not an unprimeable number, because it can be changed into a prime (1081499119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3267204 + ... + 3267534.

It is an arithmetic number, because the mean of its divisors is an integer number (26241280).

Almost surely, 2^1081499139 is an apocalyptic number.

1081499139 is a deficient number, since it is larger than the sum of its proper divisors (807873021).

1081499139 is a wasteful number, since it uses less digits than its factorization.

1081499139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 1081499139 is about 32886.1542141978. The cubic root of 1081499139 is about 1026.4600691957.

The spelling of 1081499139 in words is "one billion, eighty-one million, four hundred ninety-nine thousand, one hundred thirty-nine".