402123601 has 4 divisors (see below), whose sum is σ = 438680304. Its totient is φ = 365566900.

The previous prime is 402123583. The next prime is 402123607. The reversal of 402123601 is 106321204.

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 a cyclic number.

It is not a de Polignac number, because 402123601 - 2⁹ = 402123089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402123607) 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, 18278335 + ... + 18278356.

It is an arithmetic number, because the mean of its divisors is an integer number (109670076).

Almost surely, 2^402123601 is an apocalyptic number.

It is an amenable number.

402123601 is a deficient number, since it is larger than the sum of its proper divisors (36556703).

402123601 is a wasteful number, since it uses less digits than its factorization.

402123601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36556702.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 402123601 is about 20053.0197476590. The cubic root of 402123601 is about 738.1079011990.

Adding to 402123601 its reverse (106321204), we get a palindrome (508444805).

The spelling of 402123601 in words is "four hundred two million, one hundred twenty-three thousand, six hundred one".