1128021507 has 12 divisors (see below), whose sum is σ = 1715120680. Its totient is φ = 712434528.

The previous prime is 1128021443. The next prime is 1128021509. The reversal of 1128021507 is 7051208211.

It is not a de Polignac number, because 1128021507 - 2⁶ = 1128021443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128021509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3298138 + ... + 3298479.

Almost surely, 2^1128021507 is an apocalyptic number.

1128021507 is a deficient number, since it is larger than the sum of its proper divisors (587099173).

1128021507 is a wasteful number, since it uses less digits than its factorization.

1128021507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6596642 (or 6596639 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 1128021507 is about 33586.0314267703. The cubic root of 1128021507 is about 1040.9721884898.

Adding to 1128021507 its reverse (7051208211), we get a palindrome (8179229718).

The spelling of 1128021507 in words is "one billion, one hundred twenty-eight million, twenty-one thousand, five hundred seven".