1273501420420 has 24 divisors (see below), whose sum is σ = 2831667864984. Its totient is φ = 479435828736.

The previous prime is 1273501420417. The next prime is 1273501420421. The reversal of 1273501420420 is 240241053721.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35431285824 + 1238070134596 = 188232^2 + 1112686^2 .

It is not an unprimeable number, because it can be changed into a prime (1273501420421) 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, 1872795867 + ... + 1872796546.

It is an arithmetic number, because the mean of its divisors is an integer number (117986161041).

Almost surely, 2^{1273501420420} is an apocalyptic number.

1273501420420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1273501420420 is an abundant number, since it is smaller than the sum of its proper divisors (1558166444564).

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

1273501420420 is a wasteful number, since it uses less digits than its factorization.

1273501420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745592439 (or 3745592437 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 1273501420420 in words is "one trillion, two hundred seventy-three billion, five hundred one million, four hundred twenty thousand, four hundred twenty".