1252143442 has 16 divisors (see below), whose sum is σ = 2049671232. Its totient is φ = 568959120.

The previous prime is 1252143427. The next prime is 1252143461. The reversal of 1252143442 is 2443412521.

It is a self number, because there is not a number n which added to its sum of digits gives 1252143442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69283 + ... + 85465.

It is an arithmetic number, because the mean of its divisors is an integer number (128104452).

Almost surely, 2^1252143442 is an apocalyptic number.

1252143442 is a deficient number, since it is larger than the sum of its proper divisors (797527790).

1252143442 is a wasteful number, since it uses less digits than its factorization.

1252143442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19713.

The product of its digits is 7680, while the sum is 28.

The square root of 1252143442 is about 35385.6389231564. The cubic root of 1252143442 is about 1077.8327141878.

Adding to 1252143442 its reverse (2443412521), we get a palindrome (3695555963).

The spelling of 1252143442 in words is "one billion, two hundred fifty-two million, one hundred forty-three thousand, four hundred forty-two".