405552122 has 4 divisors (see below), whose sum is σ = 608328186. Its totient is φ = 202776060.

The previous prime is 405552089. The next prime is 405552127. The reversal of 405552122 is 221255504.

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., 327211921 + 78340201 = 18089^2 + 8851^2 .

It is a junction number, because it is equal to n+sod(n) for n = 405552091 and 405552100.

It is not an unprimeable number, because it can be changed into a prime (405552127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101388029 + ... + 101388032.

Almost surely, 2^405552122 is an apocalyptic number.

405552122 is a deficient number, since it is larger than the sum of its proper divisors (202776064).

405552122 is a wasteful number, since it uses less digits than its factorization.

405552122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202776063.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 405552122 is about 20138.3247068866. The cubic root of 405552122 is about 740.1996794962.

The spelling of 405552122 in words is "four hundred five million, five hundred fifty-two thousand, one hundred twenty-two".