1672421554 has 8 divisors (see below), whose sum is σ = 2508831468. Its totient is φ = 836144400.

The previous prime is 1672421551. The next prime is 1672421627. The reversal of 1672421554 is 4551242761.

It can be written as a sum of positive squares in 2 ways, for example, as 1578234529 + 94187025 = 39727^2 + 9705^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1672421551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9064 + ... + 58540.

Almost surely, 2^1672421554 is an apocalyptic number.

1672421554 is a deficient number, since it is larger than the sum of its proper divisors (836409914).

1672421554 is a wasteful number, since it uses less digits than its factorization.

1672421554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66380.

The product of its digits is 67200, while the sum is 37.

The square root of 1672421554 is about 40895.2509956841. The cubic root of 1672421554 is about 1186.9941685206.

The spelling of 1672421554 in words is "one billion, six hundred seventy-two million, four hundred twenty-one thousand, five hundred fifty-four".