1672258405 has 4 divisors (see below), whose sum is σ = 2006710092. Its totient is φ = 1337806720.

The previous prime is 1672258391. The next prime is 1672258463. The reversal of 1672258405 is 5048522761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5048522761 = 4159 ⋅1213879.

It can be written as a sum of positive squares in 2 ways, for example, as 677612961 + 994645444 = 26031^2 + 31538^2 .

It is not a de Polignac number, because 1672258405 - 2⁷ = 1672258277 is a prime.

It is a Smith number, since the sum of its digits (40) 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, 167225836 + ... + 167225845.

It is an arithmetic number, because the mean of its divisors is an integer number (501677523).

Almost surely, 2^1672258405 is an apocalyptic number.

It is an amenable number.

1672258405 is a deficient number, since it is larger than the sum of its proper divisors (334451687).

1672258405 is an equidigital number, since it uses as much as digits as its factorization.

1672258405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334451686.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 1672258405 is about 40893.2562288698. The cubic root of 1672258405 is about 1186.9555691597.

The spelling of 1672258405 in words is "one billion, six hundred seventy-two million, two hundred fifty-eight thousand, four hundred five".