1269772572 has 24 divisors (see below), whose sum is σ = 2967866496. Its totient is φ = 422534128.

The previous prime is 1269772561. The next prime is 1269772579. The reversal of 1269772572 is 2752779621.

It is a happy number.

It is a super-2 number, since 2×1269772572² = 3224644769206990368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269772579) 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, 83088 + ... + 97175.

It is an arithmetic number, because the mean of its divisors is an integer number (123661104).

Almost surely, 2^1269772572 is an apocalyptic number.

1269772572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1269772572 is an abundant number, since it is smaller than the sum of its proper divisors (1698093924).

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

1269772572 is a wasteful number, since it uses less digits than its factorization.

1269772572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180857 (or 180855 counting only the distinct ones).

The product of its digits is 740880, while the sum is 48.

The square root of 1269772572 is about 35633.8683277581. The cubic root of 1269772572 is about 1082.8674861674.

The spelling of 1269772572 in words is "one billion, two hundred sixty-nine million, seven hundred seventy-two thousand, five hundred seventy-two".