1272438210 has 32 divisors (see below), whose sum is σ = 3057240960. Its totient is φ = 338940288.

The previous prime is 1272438173. The next prime is 1272438217. The reversal of 1272438210 is 128342721.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1272438217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4494 + ... + 50646.

It is an arithmetic number, because the mean of its divisors is an integer number (95538780).

Almost surely, 2^1272438210 is an apocalyptic number.

1272438210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272438210 is an abundant number, since it is smaller than the sum of its proper divisors (1784802750).

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

1272438210 is a wasteful number, since it uses less digits than its factorization.

1272438210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47082.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 1272438210 is about 35671.2518703788. The cubic root of 1272438210 is about 1083.6247123651.

The spelling of 1272438210 in words is "one billion, two hundred seventy-two million, four hundred thirty-eight thousand, two hundred ten".