1267964487 has 18 divisors (see below), whose sum is σ = 1932977592. Its totient is φ = 800817624.

The previous prime is 1267964443. The next prime is 1267964491. The reversal of 1267964487 is 7844697621.

1267964487 is a `hidden beast` number, since 12 + 67 + 96 + 4 + 487 = 666.

It is not a de Polignac number, because 1267964487 - 2¹¹ = 1267962439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267964407) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 191883 + ... + 198380.

It is an arithmetic number, because the mean of its divisors is an integer number (107387644).

Almost surely, 2^1267964487 is an apocalyptic number.

1267964487 is a deficient number, since it is larger than the sum of its proper divisors (665013105).

1267964487 is a wasteful number, since it uses less digits than its factorization.

1267964487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390307 (or 390285 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 1267964487 is about 35608.4889738388. The cubic root of 1267964487 is about 1082.3532611377.

The spelling of 1267964487 in words is "one billion, two hundred sixty-seven million, nine hundred sixty-four thousand, four hundred eighty-seven".