402121141 has 4 divisors (see below), whose sum is σ = 402732000. Its totient is φ = 401510284.

The previous prime is 402121133. The next prime is 402121147. The reversal of 402121141 is 141121204.

It is a happy number.

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 402121141 - 2³ = 402121133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402121147) 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, 304441 + ... + 305758.

It is an arithmetic number, because the mean of its divisors is an integer number (100683000).

Almost surely, 2^402121141 is an apocalyptic number.

It is an amenable number.

402121141 is a deficient number, since it is larger than the sum of its proper divisors (610859).

402121141 is an equidigital number, since it uses as much as digits as its factorization.

402121141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610858.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 402121141 is about 20052.9584101698. The cubic root of 402121141 is about 738.1063960655.

Adding to 402121141 its reverse (141121204), we get a palindrome (543242345).

The spelling of 402121141 in words is "four hundred two million, one hundred twenty-one thousand, one hundred forty-one".