1227251240 has 16 divisors (see below), whose sum is σ = 2761315380. Its totient is φ = 490900480.

The previous prime is 1227251213. The next prime is 1227251243. The reversal of 1227251240 is 421527221.

It can be written as a sum of positive squares in 2 ways, for example, as 1163219236 + 64032004 = 34106^2 + 8002^2 .

It is a super-2 number, since 2×1227251240² = 3012291212163075200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1227251243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15340601 + ... + 15340680.

Almost surely, 2^1227251240 is an apocalyptic number.

1227251240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227251240 is an abundant number, since it is smaller than the sum of its proper divisors (1534064140).

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

1227251240 is a wasteful number, since it uses less digits than its factorization.

1227251240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30681292 (or 30681288 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1227251240 is about 35032.1458092421. The cubic root of 1227251240 is about 1070.6425348598.

Adding to 1227251240 its reverse (421527221), we get a palindrome (1648778461).

The spelling of 1227251240 in words is "one billion, two hundred twenty-seven million, two hundred fifty-one thousand, two hundred forty".