2672137421 has 4 divisors (see below), whose sum is σ = 2672788092. Its totient is φ = 2671486752.

The previous prime is 2672137399. The next prime is 2672137451. The reversal of 2672137421 is 1247312762.

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 2466214921 + 205922500 = 49661^2 + 14350^2 .

It is a cyclic number.

It is not a de Polignac number, because 2672137421 - 2¹⁸ = 2671875277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2672137451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319136 + ... + 327401.

It is an arithmetic number, because the mean of its divisors is an integer number (668197023).

Almost surely, 2^2672137421 is an apocalyptic number.

It is an amenable number.

2672137421 is a deficient number, since it is larger than the sum of its proper divisors (650671).

2672137421 is an equidigital number, since it uses as much as digits as its factorization.

2672137421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650670.

The product of its digits is 28224, while the sum is 35.

The square root of 2672137421 is about 51692.7211607205. The cubic root of 2672137421 is about 1387.6702032473.

The spelling of 2672137421 in words is "two billion, six hundred seventy-two million, one hundred thirty-seven thousand, four hundred twenty-one".