1671111421 has 8 divisors (see below), whose sum is σ = 1910098944. Its totient is φ = 1432188240.

The previous prime is 1671111419. The next prime is 1671111433. The reversal of 1671111421 is 1241111761.

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

It is not a de Polignac number, because 1671111421 - 2¹ = 1671111419 is a prime.

It is a super-2 number, since 2×1671111421² = 5585226762793278482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671111721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71076 + ... + 91618.

It is an arithmetic number, because the mean of its divisors is an integer number (238762368).

Almost surely, 2^1671111421 is an apocalyptic number.

It is an amenable number.

1671111421 is a deficient number, since it is larger than the sum of its proper divisors (238987523).

1671111421 is a wasteful number, since it uses less digits than its factorization.

1671111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32171.

The product of its digits is 336, while the sum is 25.

The square root of 1671111421 is about 40879.2297016468. The cubic root of 1671111421 is about 1186.6841337520.

The spelling of 1671111421 in words is "one billion, six hundred seventy-one million, one hundred eleven thousand, four hundred twenty-one".