1253501533 has 4 divisors (see below), whose sum is σ = 1258161660. Its totient is φ = 1248841408.

The previous prime is 1253501531. The next prime is 1253501537. The reversal of 1253501533 is 3351053521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 471628089 + 781873444 = 21717^2 + 27962^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253501533 - 2¹ = 1253501531 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253501531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2329660 + ... + 2330197.

It is an arithmetic number, because the mean of its divisors is an integer number (314540415).

Almost surely, 2^1253501533 is an apocalyptic number.

It is an amenable number.

1253501533 is a deficient number, since it is larger than the sum of its proper divisors (4660127).

1253501533 is an equidigital number, since it uses as much as digits as its factorization.

1253501533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660126.

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 1253501533 is about 35404.8235838000. The cubic root of 1253501533 is about 1078.2222504984. Note that the first 4 decimals are identical.

The spelling of 1253501533 in words is "one billion, two hundred fifty-three million, five hundred one thousand, five hundred thirty-three".