1269131472 has 120 divisors (see below), whose sum is σ = 4096801280. Its totient is φ = 359251200.

The previous prime is 1269131471. The next prime is 1269131483. The reversal of 1269131472 is 2741319621.

It is a super-2 number, since 2×1269131472² = 3221389386441773568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269131471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104097 + ... + 115647.

Almost surely, 2^1269131472 is an apocalyptic number.

1269131472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1269131472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2048400640).

1269131472 is an abundant number, since it is smaller than the sum of its proper divisors (2827669808).

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

1269131472 is a wasteful number, since it uses less digits than its factorization.

1269131472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11681 (or 11672 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1269131472 is about 35624.8715366105. The cubic root of 1269131472 is about 1082.6852112125.

The spelling of 1269131472 in words is "one billion, two hundred sixty-nine million, one hundred thirty-one thousand, four hundred seventy-two".