402123001 has 16 divisors (see below), whose sum is σ = 464221696. Its totient is φ = 341205696.

The previous prime is 402122977. The next prime is 402123037. The reversal of 402123001 is 100321204.

It is a cyclic number.

It is not a de Polignac number, because 402123001 - 2⁷ = 402122873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402123101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402835 + ... + 403831.

It is an arithmetic number, because the mean of its divisors is an integer number (29013856).

Almost surely, 2^402123001 is an apocalyptic number.

It is an amenable number.

402123001 is a deficient number, since it is larger than the sum of its proper divisors (62098695).

402123001 is a wasteful number, since it uses less digits than its factorization.

402123001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 402123001 is about 20053.0047873130. The cubic root of 402123001 is about 738.1075340938.

Adding to 402123001 its reverse (100321204), we get a palindrome (502444205).

The spelling of 402123001 in words is "four hundred two million, one hundred twenty-three thousand, one".