405254012 has 6 divisors (see below), whose sum is σ = 709194528. Its totient is φ = 202627004.

The previous prime is 405254011. The next prime is 405254053. The reversal of 405254012 is 210452504.

It is a happy number.

It is a super-2 number, since 2×405254012² = 328461628484192288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405254011) 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 as a sum of consecutive naturals, namely, 50656748 + ... + 50656755.

It is an arithmetic number, because the mean of its divisors is an integer number (118199088).

Almost surely, 2^405254012 is an apocalyptic number.

It is an amenable number.

405254012 is a deficient number, since it is larger than the sum of its proper divisors (303940516).

405254012 is a wasteful number, since it uses less digits than its factorization.

405254012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101313507 (or 101313505 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 405254012 is about 20130.9217871413. The cubic root of 405254012 is about 740.0182683584.

The spelling of 405254012 in words is "four hundred five million, two hundred fifty-four thousand, twelve".