1206128967 has 4 divisors (see below), whose sum is σ = 1608171960. Its totient is φ = 804085976.

The previous prime is 1206128951. The next prime is 1206128977. The reversal of 1206128967 is 7698216021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7698216021 = 3 ⋅2566072007.

It is a cyclic number.

It is not a de Polignac number, because 1206128967 - 2⁴ = 1206128951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206128977) 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, 201021492 + ... + 201021497.

It is an arithmetic number, because the mean of its divisors is an integer number (402042990).

Almost surely, 2^1206128967 is an apocalyptic number.

1206128967 is a deficient number, since it is larger than the sum of its proper divisors (402042993).

1206128967 is an equidigital number, since it uses as much as digits as its factorization.

1206128967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402042992.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 1206128967 is about 34729.3675007190. The cubic root of 1206128967 is about 1064.4646642763.

The spelling of 1206128967 in words is "one billion, two hundred six million, one hundred twenty-eight thousand, nine hundred sixty-seven".