402121354 has 4 divisors (see below), whose sum is σ = 603182034. Its totient is φ = 201060676.

The previous prime is 402121319. The next prime is 402121361. The reversal of 402121354 is 453121204.

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

It can be written as a sum of positive squares in only one way, i.e., 301821129 + 100300225 = 17373^2 + 10015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100530337 + ... + 100530340.

Almost surely, 2^402121354 is an apocalyptic number.

402121354 is a deficient number, since it is larger than the sum of its proper divisors (201060680).

402121354 is a wasteful number, since it uses less digits than its factorization.

402121354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201060679.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 402121354 is about 20052.9637211062. The cubic root of 402121354 is about 738.1065263882.

Adding to 402121354 its reverse (453121204), we get a palindrome (855242558).

The spelling of 402121354 in words is "four hundred two million, one hundred twenty-one thousand, three hundred fifty-four".