1142585821 has 8 divisors (see below), whose sum is σ = 1230863480. Its totient is φ = 1054363392.

The previous prime is 1142585803. The next prime is 1142585833. The reversal of 1142585821 is 1285852411.

It can be written as a sum of positive squares in 4 ways, for example, as 1092025 + 1141493796 = 1045^2 + 33786^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1142585821 - 2¹⁵ = 1142553053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142585021) 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, 35785 + ... + 59713.

It is an arithmetic number, because the mean of its divisors is an integer number (153857935).

Almost surely, 2^1142585821 is an apocalyptic number.

It is an amenable number.

1142585821 is a deficient number, since it is larger than the sum of its proper divisors (88277659).

1142585821 is a wasteful number, since it uses less digits than its factorization.

1142585821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27615.

The product of its digits is 25600, while the sum is 37.

The square root of 1142585821 is about 33802.1570465555. The cubic root of 1142585821 is about 1045.4331731327.

The spelling of 1142585821 in words is "one billion, one hundred forty-two million, five hundred eighty-five thousand, eight hundred twenty-one".