1272346240 has 64 divisors (see below), whose sum is σ = 3318239520. Its totient is φ = 462668800.

The previous prime is 1272346211. The next prime is 1272346241. The reversal of 1272346240 is 426432721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (1272346241) 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, 83326 + ... + 97405.

Almost surely, 2^1272346240 is an apocalyptic number.

1272346240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272346240 is an abundant number, since it is smaller than the sum of its proper divisors (2045893280).

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

1272346240 is a wasteful number, since it uses less digits than its factorization.

1272346240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180761 (or 180749 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 1272346240 is about 35669.9627137456. The cubic root of 1272346240 is about 1083.5986041252.

Adding to 1272346240 its reverse (426432721), we get a palindrome (1698778961).

The spelling of 1272346240 in words is "one billion, two hundred seventy-two million, three hundred forty-six thousand, two hundred forty".