402120343 has 4 divisors (see below), whose sum is σ = 406024528. Its totient is φ = 398216160.

The previous prime is 402120337. The next prime is 402120347. The reversal of 402120343 is 343021204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402120343 - 2⁵ = 402120311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402120343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402120347) 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, 1951938 + ... + 1952143.

It is an arithmetic number, because the mean of its divisors is an integer number (101506132).

Almost surely, 2^402120343 is an apocalyptic number.

402120343 is a deficient number, since it is larger than the sum of its proper divisors (3904185).

402120343 is a wasteful number, since it uses less digits than its factorization.

402120343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904184.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 402120343 is about 20052.9385128464. The cubic root of 402120343 is about 738.1059078135.

Adding to 402120343 its reverse (343021204), we get a palindrome (745141547).

The spelling of 402120343 in words is "four hundred two million, one hundred twenty thousand, three hundred forty-three".