1267122142 has 32 divisors (see below), whose sum is σ = 2235794400. Its totient is φ = 530987520.

The previous prime is 1267122139. The next prime is 1267122169. The reversal of 1267122142 is 2412217621.

It is a self number, because there is not a number n which added to its sum of digits gives 1267122142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270234 + ... + 274882.

It is an arithmetic number, because the mean of its divisors is an integer number (69868575).

Almost surely, 2^1267122142 is an apocalyptic number.

1267122142 is a deficient number, since it is larger than the sum of its proper divisors (968672258).

1267122142 is a wasteful number, since it uses less digits than its factorization.

1267122142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628.

The product of its digits is 2688, while the sum is 28.

The square root of 1267122142 is about 35596.6591409924. The cubic root of 1267122142 is about 1082.1135286545.

Adding to 1267122142 its reverse (2412217621), we get a palindrome (3679339763).

The spelling of 1267122142 in words is "one billion, two hundred sixty-seven million, one hundred twenty-two thousand, one hundred forty-two".