1245253143 has 16 divisors (see below), whose sum is σ = 1745185536. Its totient is φ = 788272320.

The previous prime is 1245253133. The next prime is 1245253147. The reversal of 1245253143 is 3413525421.

It is not a de Polignac number, because 1245253143 - 2¹⁶ = 1245187607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1245253143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245253147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56413 + ... + 75318.

It is an arithmetic number, because the mean of its divisors is an integer number (109074096).

Almost surely, 2^1245253143 is an apocalyptic number.

1245253143 is a deficient number, since it is larger than the sum of its proper divisors (499932393).

1245253143 is a wasteful number, since it uses less digits than its factorization.

1245253143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131894.

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

The square root of 1245253143 is about 35288.1445105860. The cubic root of 1245253143 is about 1075.8520428644.

Adding to 1245253143 its reverse (3413525421), we get a palindrome (4658778564).

The spelling of 1245253143 in words is "one billion, two hundred forty-five million, two hundred fifty-three thousand, one hundred forty-three".