1261528324 has 81 divisors (see below), whose sum is σ = 2674542087. Its totient is φ = 519131088.

The previous prime is 1261528319. The next prime is 1261528337. The reversal of 1261528324 is 4238251621.

The square root of 1261528324 is 35518.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 1261528324.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21381807 + ... + 21381865.

Almost surely, 2^1261528324 is an apocalyptic number.

1261528324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1261528324 is the 35518-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261528324

1261528324 is an abundant number, since it is smaller than the sum of its proper divisors (1413013763).

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

1261528324 is an equidigital number, since it uses as much as digits as its factorization.

1261528324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 111 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The cubic root of 1261528324 is about 1080.5188190841.

Adding to 1261528324 its reverse (4238251621), we get a palindrome (5499779945).

It can be divided in two parts, 12 and 61528324, that added together give a square (61528336 = 7844²).

The spelling of 1261528324 in words is "one billion, two hundred sixty-one million, five hundred twenty-eight thousand, three hundred twenty-four".