1242476649 has 12 divisors (see below), whose sum is σ = 1812459012. Its totient is φ = 820116000.

The previous prime is 1242476593. The next prime is 1242476657. The reversal of 1242476649 is 9466742421.

It can be written as a sum of positive squares in 2 ways, for example, as 564395049 + 678081600 = 23757^2 + 26040^2 .

It is not a de Polignac number, because 1242476649 - 2⁸ = 1242476393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1242476689) 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 11 ways as a sum of consecutive naturals, for example, 682522 + ... + 684339.

It is an arithmetic number, because the mean of its divisors is an integer number (151038251).

Almost surely, 2^1242476649 is an apocalyptic number.

It is an amenable number.

1242476649 is a deficient number, since it is larger than the sum of its proper divisors (569982363).

1242476649 is a wasteful number, since it uses less digits than its factorization.

1242476649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366968 (or 1366965 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 1242476649 is about 35248.7822342843. The cubic root of 1242476649 is about 1075.0518522672.

The spelling of 1242476649 in words is "one billion, two hundred forty-two million, four hundred seventy-six thousand, six hundred forty-nine".