1405634746 has 8 divisors (see below), whose sum is σ = 2111893524. Its totient is φ = 701670240.

The previous prime is 1405634731. The next prime is 1405634777. The reversal of 1405634746 is 6474365041.

It can be written as a sum of positive squares in 2 ways, for example, as 1172309121 + 233325625 = 34239^2 + 15275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1405634699 and 1405634708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572035 + ... + 574486.

Almost surely, 2^1405634746 is an apocalyptic number.

1405634746 is a deficient number, since it is larger than the sum of its proper divisors (706258778).

1405634746 is a wasteful number, since it uses less digits than its factorization.

1405634746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147136.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 1405634746 is about 37491.7957158630. The cubic root of 1405634746 is about 1120.1877730453.

Adding to 1405634746 its reverse (6474365041), we get a palindrome (7879999787).

The spelling of 1405634746 in words is "one billion, four hundred five million, six hundred thirty-four thousand, seven hundred forty-six".