11139534 has 48 divisors (see below), whose sum is σ = 27780480. Its totient is φ = 3160080.

The previous prime is 11139533. The next prime is 11139563. The reversal of 11139534 is 43593111.

It is a junction number, because it is equal to n+sod(n) for n = 11139498 and 11139507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11139533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26377 + ... + 26795.

It is an arithmetic number, because the mean of its divisors is an integer number (578760).

Almost surely, 2^11139534 is an apocalyptic number.

11139534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11139534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13890240).

11139534 is an abundant number, since it is smaller than the sum of its proper divisors (16640946).

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

11139534 is a wasteful number, since it uses less digits than its factorization.

11139534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 642 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 11139534 is about 3337.5940436188. The cubic root of 11139534 is about 223.3344268653.

The spelling of 11139534 in words is "eleven million, one hundred thirty-nine thousand, five hundred thirty-four".