402021411 has 12 divisors (see below), whose sum is σ = 589188936. Its totient is φ = 243649120.

The previous prime is 402021353. The next prime is 402021419. The reversal of 402021411 is 114120204.

It is not a de Polignac number, because 402021411 - 2¹³ = 402013219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402021419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553386 + ... + 554111.

It is an arithmetic number, because the mean of its divisors is an integer number (49099078).

Almost surely, 2^402021411 is an apocalyptic number.

402021411 is a deficient number, since it is larger than the sum of its proper divisors (187167525).

402021411 is a wasteful number, since it uses less digits than its factorization.

402021411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107522 (or 1107511 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 402021411 is about 20050.4715904639. The cubic root of 402021411 is about 738.0453718038.

Adding to 402021411 its reverse (114120204), we get a palindrome (516141615).

The spelling of 402021411 in words is "four hundred two million, twenty-one thousand, four hundred eleven".