1671272020 has 24 divisors (see below), whose sum is σ = 3828732768. Its totient is φ = 607735200.

The previous prime is 1671272017. The next prime is 1671272027. The reversal of 1671272020 is 202721761.

It is a self number, because there is not a number n which added to its sum of digits gives 1671272020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671272027) 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, 3798126 + ... + 3798565.

It is an arithmetic number, because the mean of its divisors is an integer number (159530532).

Almost surely, 2^1671272020 is an apocalyptic number.

1671272020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1671272020 is an abundant number, since it is smaller than the sum of its proper divisors (2157460748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1671272020 is a wasteful number, since it uses less digits than its factorization.

1671272020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7596711 (or 7596709 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 1671272020 is about 40881.1939649517. The cubic root of 1671272020 is about 1186.7221472118.

Adding to 1671272020 its reverse (202721761), we get a palindrome (1873993781).

The spelling of 1671272020 in words is "one billion, six hundred seventy-one million, two hundred seventy-two thousand, twenty".