11429581 has 2 divisors, whose sum is σ = 11429582. Its totient is φ = 11429580.

The previous prime is 11429557. The next prime is 11429617. The reversal of 11429581 is 18592411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6456681 + 4972900 = 2541^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 11429581 - 2⁵ = 11429549 is a prime.

It is a super-2 number, since 2×11429581² = 261270643671122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11429531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714790 + 5714791.

It is an arithmetic number, because the mean of its divisors is an integer number (5714791).

Almost surely, 2^11429581 is an apocalyptic number.

It is an amenable number.

11429581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11429581 is an equidigital number, since it uses as much as digits as its factorization.

11429581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 31.

The square root of 11429581 is about 3380.7663332446. The cubic root of 11429581 is about 225.2562085549.

The spelling of 11429581 in words is "eleven million, four hundred twenty-nine thousand, five hundred eighty-one".