1240552136 has 16 divisors (see below), whose sum is σ = 2332629900. Its totient is φ = 618517504.

The previous prime is 1240552063. The next prime is 1240552139. The reversal of 1240552136 is 6312550421.

It can be written as a sum of positive squares in 2 ways, for example, as 1225420036 + 15132100 = 35006^2 + 3890^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1240552099 and 1240552108.

It is not an unprimeable number, because it can be changed into a prime (1240552139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216821 + ... + 222468.

Almost surely, 2^1240552136 is an apocalyptic number.

It is an amenable number.

1240552136 is a deficient number, since it is larger than the sum of its proper divisors (1092077764).

1240552136 is a wasteful number, since it uses less digits than its factorization.

1240552136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439648 (or 439644 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1240552136 is about 35221.4726551858. The cubic root of 1240552136 is about 1074.4965043634.

The spelling of 1240552136 in words is "one billion, two hundred forty million, five hundred fifty-two thousand, one hundred thirty-six".