405120051 has 12 divisors (see below), whose sum is σ = 668769712. Its totient is φ = 231497136.

The previous prime is 405120049. The next prime is 405120103. The reversal of 405120051 is 150021504.

It is not a de Polignac number, because 405120051 - 2¹ = 405120049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405120011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3215176 + ... + 3215301.

Almost surely, 2^405120051 is an apocalyptic number.

405120051 is a deficient number, since it is larger than the sum of its proper divisors (263649661).

405120051 is a wasteful number, since it uses less digits than its factorization.

405120051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6430490 (or 6430487 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 405120051 is about 20127.5942675721. The cubic root of 405120051 is about 739.9367190835.

Adding to 405120051 its reverse (150021504), we get a palindrome (555141555).

The spelling of 405120051 in words is "four hundred five million, one hundred twenty thousand, fifty-one".