1251342442 has 16 divisors (see below), whose sum is σ = 2203136640. Its totient is φ = 521795088.

The previous prime is 1251342437. The next prime is 1251342457. The reversal of 1251342442 is 2442431521.

It is a self number, because there is not a number n which added to its sum of digits gives 1251342442.

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, 1207342 + ... + 1208377.

It is an arithmetic number, because the mean of its divisors is an integer number (137696040).

Almost surely, 2^1251342442 is an apocalyptic number.

1251342442 is a deficient number, since it is larger than the sum of its proper divisors (951794198).

1251342442 is a wasteful number, since it uses less digits than its factorization.

1251342442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415765.

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

The square root of 1251342442 is about 35374.3189616422. The cubic root of 1251342442 is about 1077.6028341982.

Adding to 1251342442 its reverse (2442431521), we get a palindrome (3693773963).

The spelling of 1251342442 in words is "one billion, two hundred fifty-one million, three hundred forty-two thousand, four hundred forty-two".