1264121772 has 24 divisors (see below), whose sum is σ = 2991163392. Its totient is φ = 415438800.

The previous prime is 1264121759. The next prime is 1264121773. The reversal of 1264121772 is 2771214621.

It is not an unprimeable number, because it can be changed into a prime (1264121773) 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, 741004 + ... + 742707.

It is an arithmetic number, because the mean of its divisors is an integer number (124631808).

Almost surely, 2^1264121772 is an apocalyptic number.

1264121772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1264121772 is an abundant number, since it is smaller than the sum of its proper divisors (1727041620).

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

1264121772 is a wasteful number, since it uses less digits than its factorization.

1264121772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483789 (or 1483787 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 1264121772 is about 35554.4901805665. The cubic root of 1264121772 is about 1081.2587552411.

The spelling of 1264121772 in words is "one billion, two hundred sixty-four million, one hundred twenty-one thousand, seven hundred seventy-two".