1272542240 has 24 divisors (see below), whose sum is σ = 3006381420. Its totient is φ = 509016832.

The previous prime is 1272542231. The next prime is 1272542261. The reversal of 1272542240 is 422452721.

It can be written as a sum of positive squares in 2 ways, for example, as 1043806864 + 228735376 = 32308^2 + 15124^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3976535 + ... + 3976854.

Almost surely, 2^1272542240 is an apocalyptic number.

1272542240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272542240 is an abundant number, since it is smaller than the sum of its proper divisors (1733839180).

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

1272542240 is an equidigital number, since it uses as much as digits as its factorization.

1272542240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953404 (or 7953396 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 1272542240 is about 35672.7100176031. The cubic root of 1272542240 is about 1083.6542426548.

Adding to 1272542240 its reverse (422452721), we get a palindrome (1694994961).

The spelling of 1272542240 in words is "one billion, two hundred seventy-two million, five hundred forty-two thousand, two hundred forty".