11971429 has 4 divisors (see below), whose sum is σ = 12090060. Its totient is φ = 11852800.

The previous prime is 11971411. The next prime is 11971439. The reversal of 11971429 is 92417911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92417911 = 3067 ⋅30133.

It can be written as a sum of positive squares in 2 ways, for example, as 9443329 + 2528100 = 3073^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 11971429 - 2⁵ = 11971397 is a prime.

It is a super-2 number, since 2×11971429² = 286630224604082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11971394 and 11971403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59164 + ... + 59365.

It is an arithmetic number, because the mean of its divisors is an integer number (3022515).

Almost surely, 2^11971429 is an apocalyptic number.

It is an amenable number.

11971429 is a deficient number, since it is larger than the sum of its proper divisors (118631).

11971429 is a wasteful number, since it uses less digits than its factorization.

11971429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118630.

The product of its digits is 4536, while the sum is 34.

The square root of 11971429 is about 3459.9752889291. The cubic root of 11971429 is about 228.7610061692.

The spelling of 11971429 in words is "eleven million, nine hundred seventy-one thousand, four hundred twenty-nine".