4002431 has 2 divisors, whose sum is σ = 4002432. Its totient is φ = 4002430.

The previous prime is 4002403. The next prime is 4002457. The reversal of 4002431 is 1342004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4002431 - 2¹⁰ = 4001407 is a prime.

It is a super-2 number, since 2×4002431² = 32038907819522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001215 + 2001216.

It is an arithmetic number, because the mean of its divisors is an integer number (2001216).

Almost surely, 2^4002431 is an apocalyptic number.

4002431 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002431 is an equidigital number, since it uses as much as digits as its factorization.

4002431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4002431 is about 2000.6076576880. The cubic root of 4002431 is about 158.7722567840.

Adding to 4002431 its reverse (1342004), we get a palindrome (5344435).

The spelling of 4002431 in words is "four million, two thousand, four hundred thirty-one".