402010001 has 8 divisors (see below), whose sum is σ = 407482824. Its totient is φ = 396564480.

The previous prime is 402009973. The next prime is 402010003. The reversal of 402010001 is 100010204.

It can be written as a sum of positive squares in 4 ways, for example, as 53217025 + 348792976 = 7295^2 + 18676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402010001 is a prime.

It is a super-2 number, since 2×402010001² = 323224081808040002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402010003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23741 + ... + 36981.

It is an arithmetic number, because the mean of its divisors is an integer number (50935353).

Almost surely, 2^402010001 is an apocalyptic number.

It is an amenable number.

402010001 is a deficient number, since it is larger than the sum of its proper divisors (5472823).

402010001 is a wasteful number, since it uses less digits than its factorization.

402010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13651.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 402010001 is about 20050.1870564840. The cubic root of 402010001 is about 738.0383894416.

Adding to 402010001 its reverse (100010204), we get a palindrome (502020205).

The spelling of 402010001 in words is "four hundred two million, ten thousand, one".