402142001 has 2 divisors, whose sum is σ = 402142002. Its totient is φ = 402142000.

The previous prime is 402141997. The next prime is 402142003. The reversal of 402142001 is 100241204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377291776 + 24850225 = 19424^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 402142001 - 2² = 402141997 is a prime.

Together with 402142003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402142003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201071000 + 201071001.

It is an arithmetic number, because the mean of its divisors is an integer number (201071001).

Almost surely, 2^402142001 is an apocalyptic number.

It is an amenable number.

402142001 is a deficient number, since it is larger than the sum of its proper divisors (1).

402142001 is an equidigital number, since it uses as much as digits as its factorization.

402142001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 402142001 is about 20053.4785261809. The cubic root of 402142001 is about 738.1191589136.

Adding to 402142001 its reverse (100241204), we get a palindrome (502383205).

The spelling of 402142001 in words is "four hundred two million, one hundred forty-two thousand, one".