405144625 has 16 divisors (see below), whose sum is σ = 506203776. Its totient is φ = 323742000.

The previous prime is 405144613. The next prime is 405144631. The reversal of 405144625 is 526441504.

It is a happy number.

It is not a de Polignac number, because 405144625 - 2²¹ = 403047473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169690 + ... + 172060.

It is an arithmetic number, because the mean of its divisors is an integer number (31637736).

Almost surely, 2^405144625 is an apocalyptic number.

It is an amenable number.

405144625 is a deficient number, since it is larger than the sum of its proper divisors (101059151).

405144625 is a wasteful number, since it uses less digits than its factorization.

405144625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3753 (or 3743 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 405144625 is about 20128.2047137841. The cubic root of 405144625 is about 739.9516799469.

It can be divided in two parts, 405144 and 625, that added together give a square (405769 = 637²).

The spelling of 405144625 in words is "four hundred five million, one hundred forty-four thousand, six hundred twenty-five".