1253501121 has 8 divisors (see below), whose sum is σ = 1671498400. Its totient is φ = 835585632.

The previous prime is 1253501107. The next prime is 1253501129. The reversal of 1253501121 is 1211053521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1253501121 - 2¹⁴ = 1253484737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1253501129) 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, 49530 + ... + 70428.

It is an arithmetic number, because the mean of its divisors is an integer number (208937300).

Almost surely, 2^1253501121 is an apocalyptic number.

It is an amenable number.

1253501121 is a deficient number, since it is larger than the sum of its proper divisors (417997279).

1253501121 is a wasteful number, since it uses less digits than its factorization.

1253501121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40895.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1253501121 is about 35404.8177653833. The cubic root of 1253501121 is about 1078.2221323686. Note that the first 3 decimals are identical.

Adding to 1253501121 its reverse (1211053521), we get a palindrome (2464554642).

The spelling of 1253501121 in words is "one billion, two hundred fifty-three million, five hundred one thousand, one hundred twenty-one".