1142251405 has 8 divisors (see below), whose sum is σ = 1442844000. Its totient is φ = 865706256.

The previous prime is 1142251381. The next prime is 1142251421. The reversal of 1142251405 is 5041522411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1142251405 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1142251405.

It is a congruent number.

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, 6011755 + ... + 6011944.

It is an arithmetic number, because the mean of its divisors is an integer number (180355500).

Almost surely, 2^1142251405 is an apocalyptic number.

It is an amenable number.

1142251405 is a deficient number, since it is larger than the sum of its proper divisors (300592595).

1142251405 is a wasteful number, since it uses less digits than its factorization.

1142251405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12023723.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1142251405 is about 33797.2100179882. The cubic root of 1142251405 is about 1045.3311695056.

Adding to 1142251405 its reverse (5041522411), we get a palindrome (6183773816).

The spelling of 1142251405 in words is "one billion, one hundred forty-two million, two hundred fifty-one thousand, four hundred five".