11521429 has 12 divisors (see below), whose sum is σ = 12551520. Its totient is φ = 10546200.

The previous prime is 11521421. The next prime is 11521453. The reversal of 11521429 is 92412511.

It is a happy number.

It is not a de Polignac number, because 11521429 - 2³ = 11521421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521421) 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, 17944 + ... + 18574.

It is an arithmetic number, because the mean of its divisors is an integer number (1045960).

Almost surely, 2^11521429 is an apocalyptic number.

11521429 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11521429 is a deficient number, since it is larger than the sum of its proper divisors (1030091).

11521429 is an equidigital number, since it uses as much as digits as its factorization.

11521429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 681 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 11521429 is about 3394.3230547489. The cubic root of 11521429 is about 225.8579850209.

The spelling of 11521429 in words is "eleven million, five hundred twenty-one thousand, four hundred twenty-nine".