1264124643 has 32 divisors (see below), whose sum is σ = 1813487616. Its totient is φ = 781369248.

The previous prime is 1264124639. The next prime is 1264124657. The reversal of 1264124643 is 3464214621.

It is a happy number.

It is not a de Polignac number, because 1264124643 - 2² = 1264124639 is a prime.

It is a super-2 number, since 2×1264124643² = 3196022226079754898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264124623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345180 + ... + 348822.

It is an arithmetic number, because the mean of its divisors is an integer number (56671488).

Almost surely, 2^1264124643 is an apocalyptic number.

1264124643 is a deficient number, since it is larger than the sum of its proper divisors (549362973).

1264124643 is a wasteful number, since it uses less digits than its factorization.

1264124643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823.

The product of its digits is 27648, while the sum is 33.

The square root of 1264124643 is about 35554.5305551909. The cubic root of 1264124643 is about 1081.2595738045.

The spelling of 1264124643 in words is "one billion, two hundred sixty-four million, one hundred twenty-four thousand, six hundred forty-three".