1253541243 has 8 divisors (see below), whose sum is σ = 1671880000. Its totient is φ = 835448328.

The previous prime is 1253541221. The next prime is 1253541253. The reversal of 1253541243 is 3421453521.

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

It is not a de Polignac number, because 1253541243 - 2⁸ = 1253540987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253541243.

It is not an unprimeable number, because it can be changed into a prime (1253541253) 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, 49213 + ... + 70206.

It is an arithmetic number, because the mean of its divisors is an integer number (208985000).

Almost surely, 2^1253541243 is an apocalyptic number.

1253541243 is a deficient number, since it is larger than the sum of its proper divisors (418338757).

1253541243 is a wasteful number, since it uses less digits than its factorization.

1253541243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122921.

The product of its digits is 14400, while the sum is 30.

The square root of 1253541243 is about 35405.3843786507. The cubic root of 1253541243 is about 1078.2336361389.

Adding to 1253541243 its reverse (3421453521), we get a palindrome (4674994764).

The spelling of 1253541243 in words is "one billion, two hundred fifty-three million, five hundred forty-one thousand, two hundred forty-three".