1271990407420 has 24 divisors (see below), whose sum is σ = 2671276765248. Its totient is φ = 508777704000.

The previous prime is 1271990407367. The next prime is 1271990407447. The reversal of 1271990407420 is 247040991721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581716 + ... + 1697755.

It is an arithmetic number, because the mean of its divisors is an integer number (111303198552).

Almost surely, 2^{1271990407420} is an apocalyptic number.

1271990407420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271990407420 is an abundant number, since it is smaller than the sum of its proper divisors (1399286357828).

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

1271990407420 is a wasteful number, since it uses less digits than its factorization.

1271990407420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307381 (or 2307379 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 1271990407420 in words is "one trillion, two hundred seventy-one billion, nine hundred ninety million, four hundred seven thousand, four hundred twenty".