1266172072 has 24 divisors (see below), whose sum is σ = 2609519850. Its totient is φ = 575532320.

The previous prime is 1266172069. The next prime is 1266172129. The reversal of 1266172072 is 2702716621.

It can be written as a sum of positive squares in only one way, i.e., 1265509476 + 662596 = 35574^2 + 814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 653047 + ... + 654982.

Almost surely, 2^1266172072 is an apocalyptic number.

It is an amenable number.

1266172072 is an abundant number, since it is smaller than the sum of its proper divisors (1343347778).

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

1266172072 is a wasteful number, since it uses less digits than its factorization.

1266172072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308057 (or 1308042 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1266172072 is about 35583.3117064727. The cubic root of 1266172072 is about 1081.8430099674.

Adding to 1266172072 its reverse (2702716621), we get a palindrome (3968888693).

The spelling of 1266172072 in words is "one billion, two hundred sixty-six million, one hundred seventy-two thousand, seventy-two".