1267011240 has 128 divisors (see below), whose sum is σ = 4187289600. Its totient is φ = 304139520.

The previous prime is 1267011223. The next prime is 1267011293. The reversal of 1267011240 is 421107621.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1267011240.

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 31 ways as a sum of consecutive naturals, for example, 131301 + ... + 140619.

It is an arithmetic number, because the mean of its divisors is an integer number (32713200).

Almost surely, 2^1267011240 is an apocalyptic number.

1267011240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1267011240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2093644800).

1267011240 is an abundant number, since it is smaller than the sum of its proper divisors (2920278360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1267011240 is a wasteful number, since it uses less digits than its factorization.

1267011240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9447 (or 9443 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1267011240 is about 35595.1013483597. The cubic root of 1267011240 is about 1082.0819578870.

Adding to 1267011240 its reverse (421107621), we get a palindrome (1688118861).

The spelling of 1267011240 in words is "one billion, two hundred sixty-seven million, eleven thousand, two hundred forty".