1142251521 has 8 divisors (see below), whose sum is σ = 1538081664. Its totient is φ = 753961200.

The previous prime is 1142251501. The next prime is 1142251529. The reversal of 1142251521 is 1251522411.

It is a happy number.

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

It is not a de Polignac number, because 1142251521 - 2¹¹ = 1142249473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1142251491 and 1142251500.

It is not an unprimeable number, because it can be changed into a prime (1142251529) 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, 1884601 + ... + 1885206.

It is an arithmetic number, because the mean of its divisors is an integer number (192260208).

Almost surely, 2^1142251521 is an apocalyptic number.

It is an amenable number.

1142251521 is a deficient number, since it is larger than the sum of its proper divisors (395830143).

1142251521 is a wasteful number, since it uses less digits than its factorization.

1142251521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769911.

The product of its digits is 800, while the sum is 24.

The square root of 1142251521 is about 33797.2117341061. The cubic root of 1142251521 is about 1045.3312048914.

Adding to 1142251521 its reverse (1251522411), we get a palindrome (2393773932).

The spelling of 1142251521 in words is "one billion, one hundred forty-two million, two hundred fifty-one thousand, five hundred twenty-one".