32142391 has 4 divisors (see below), whose sum is σ = 32157000. Its totient is φ = 32127784.

The previous prime is 32142389. The next prime is 32142403. The reversal of 32142391 is 19324123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 32142391 - 2¹ = 32142389 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 (32142301) 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, 3256 + ... + 8653.

It is an arithmetic number, because the mean of its divisors is an integer number (8039250).

Almost surely, 2^32142391 is an apocalyptic number.

32142391 is a deficient number, since it is larger than the sum of its proper divisors (14609).

32142391 is a wasteful number, since it uses less digits than its factorization.

32142391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608.

The product of its digits is 1296, while the sum is 25.

The square root of 32142391 is about 5669.4259850535. The cubic root of 32142391 is about 317.9504128738.

The spelling of 32142391 in words is "thirty-two million, one hundred forty-two thousand, three hundred ninety-one".