1356531225 has 48 divisors (see below), whose sum is σ = 2566502400. Its totient is φ = 619329600.

The previous prime is 1356531221. The next prime is 1356531247. The reversal of 1356531225 is 5221356531.

It is a happy number.

It is not a de Polignac number, because 1356531225 - 2² = 1356531221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1356531221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 645226 + ... + 647324.

It is an arithmetic number, because the mean of its divisors is an integer number (53468800).

Almost surely, 2^1356531225 is an apocalyptic number.

1356531225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1356531225 is a deficient number, since it is larger than the sum of its proper divisors (1209971175).

1356531225 is a wasteful number, since it uses less digits than its factorization.

1356531225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350 (or 3345 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 1356531225 is about 36831.1176181229. The cubic root of 1356531225 is about 1106.9888970194.

Adding to 1356531225 its reverse (5221356531), we get a palindrome (6577887756).

The spelling of 1356531225 in words is "one billion, three hundred fifty-six million, five hundred thirty-one thousand, two hundred twenty-five".