1237987745 has 24 divisors (see below), whose sum is σ = 1520894976. Its totient is φ = 967323168.

The previous prime is 1237987721. The next prime is 1237987763. The reversal of 1237987745 is 5477897321.

It is not a de Polignac number, because 1237987745 - 2²⁰ = 1236939169 is a prime.

It is a super-2 number, since 2×1237987745² = 3065227313540370050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4374374 + ... + 4374656.

It is an arithmetic number, because the mean of its divisors is an integer number (63370624).

Almost surely, 2^1237987745 is an apocalyptic number.

It is an amenable number.

1237987745 is a deficient number, since it is larger than the sum of its proper divisors (282907231).

1237987745 is an equidigital number, since it uses as much as digits as its factorization.

1237987745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 498 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 53.

The square root of 1237987745 is about 35185.0500212803. The cubic root of 1237987745 is about 1073.7556165267.

The spelling of 1237987745 in words is "one billion, two hundred thirty-seven million, nine hundred eighty-seven thousand, seven hundred forty-five".