402212001 has 4 divisors (see below), whose sum is σ = 536282672. Its totient is φ = 268141332.

The previous prime is 402211919. The next prime is 402212003. The reversal of 402212001 is 100212204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 402212001 - 2⁹ = 402211489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402212003) 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, 67035331 + ... + 67035336.

It is an arithmetic number, because the mean of its divisors is an integer number (134070668).

Almost surely, 2^402212001 is an apocalyptic number.

It is an amenable number.

402212001 is a deficient number, since it is larger than the sum of its proper divisors (134070671).

402212001 is a wasteful number, since it uses less digits than its factorization.

402212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134070670.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 402212001 is about 20055.2237833438. The cubic root of 402212001 is about 738.1619840379.

Adding to 402212001 its reverse (100212204), we get a palindrome (502424205).

The spelling of 402212001 in words is "four hundred two million, two hundred twelve thousand, one".