1325253501 has 128 divisors (see below), whose sum is σ = 2412748800. Its totient is φ = 708238080.

The previous prime is 1325253443. The next prime is 1325253539. The reversal of 1325253501 is 1053525231.

It is a happy number.

1325253501 is a `hidden beast` number, since 132 + 5 + 25 + 3 + 501 = 666.

It is not a de Polignac number, because 1325253501 - 2⁶ = 1325253437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325253541) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12158235 + ... + 12158343.

It is an arithmetic number, because the mean of its divisors is an integer number (18849600).

Almost surely, 2^1325253501 is an apocalyptic number.

1325253501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1325253501 is a deficient number, since it is larger than the sum of its proper divisors (1087495299).

1325253501 is a wasteful number, since it uses less digits than its factorization.

1325253501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1325253501 is about 36404.0313839003. The cubic root of 1325253501 is about 1098.4146586973.

Adding to 1325253501 its reverse (1053525231), we get a palindrome (2378778732).

The spelling of 1325253501 in words is "one billion, three hundred twenty-five million, two hundred fifty-three thousand, five hundred one".