1267634064 has 40 divisors (see below), whose sum is σ = 3354597792. Its totient is φ = 412238080.

The previous prime is 1267634063. The next prime is 1267634083. The reversal of 1267634064 is 4604367621.

It is a happy number.

It is a super-2 number, since 2×1267634064² = 3213792240426312192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1267634063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320094 + ... + 324029.

Almost surely, 2^1267634064 is an apocalyptic number.

It is an amenable number.

1267634064 is an abundant number, since it is smaller than the sum of its proper divisors (2086963728).

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

1267634064 is a wasteful number, since it uses less digits than its factorization.

1267634064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644175 (or 644169 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 1267634064 is about 35603.8490054095. The cubic root of 1267634064 is about 1082.2592349812.

The spelling of 1267634064 in words is "one billion, two hundred sixty-seven million, six hundred thirty-four thousand, sixty-four".