402142023 has 8 divisors (see below), whose sum is σ = 595766000. Its totient is φ = 268094664.

The previous prime is 402142019. The next prime is 402142031. The reversal of 402142023 is 320241204.

It is not a de Polignac number, because 402142023 - 2² = 402142019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402141987 and 402142005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402142003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7447048 + ... + 7447101.

It is an arithmetic number, because the mean of its divisors is an integer number (74470750).

Almost surely, 2^402142023 is an apocalyptic number.

402142023 is a deficient number, since it is larger than the sum of its proper divisors (193623977).

402142023 is a wasteful number, since it uses less digits than its factorization.

402142023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14894158 (or 14894152 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 402142023 is about 20053.4790747142. The cubic root of 402142023 is about 738.1191723737.

Adding to 402142023 its reverse (320241204), we get a palindrome (722383227).

The spelling of 402142023 in words is "four hundred two million, one hundred forty-two thousand, twenty-three".