39429121 has 4 divisors (see below), whose sum is σ = 39812032. Its totient is φ = 39046212.

The previous prime is 39429101. The next prime is 39429133. The reversal of 39429121 is 12192493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12192493 = 701 ⋅17393.

It is a cyclic number.

It is not a de Polignac number, because 39429121 - 2¹³ = 39420929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39429101) 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, 191301 + ... + 191506.

It is an arithmetic number, because the mean of its divisors is an integer number (9953008).

Almost surely, 2^39429121 is an apocalyptic number.

It is an amenable number.

39429121 is a deficient number, since it is larger than the sum of its proper divisors (382911).

39429121 is a wasteful number, since it uses less digits than its factorization.

39429121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382910.

The product of its digits is 3888, while the sum is 31.

The square root of 39429121 is about 6279.2611826552. The cubic root of 39429121 is about 340.3604050276.

The spelling of 39429121 in words is "thirty-nine million, four hundred twenty-nine thousand, one hundred twenty-one".