1026670405 has 4 divisors (see below), whose sum is σ = 1232004492. Its totient is φ = 821336320.

The previous prime is 1026670391. The next prime is 1026670417. The reversal of 1026670405 is 5040766201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118069956 + 908600449 = 10866^2 + 30143^2 .

It is not a de Polignac number, because 1026670405 - 2⁹ = 1026669893 is a prime.

It is a super-4 number, since 4×1026670405⁴ (a number of 37 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 102667036 + ... + 102667045.

It is an arithmetic number, because the mean of its divisors is an integer number (308001123).

Almost surely, 2^1026670405 is an apocalyptic number.

It is an amenable number.

1026670405 is a deficient number, since it is larger than the sum of its proper divisors (205334087).

1026670405 is an equidigital number, since it uses as much as digits as its factorization.

1026670405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205334086.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 1026670405 is about 32041.6979106913. The cubic root of 1026670405 is about 1008.8122511228.

The spelling of 1026670405 in words is "one billion, twenty-six million, six hundred seventy thousand, four hundred five".