1012321858 has 4 divisors (see below), whose sum is σ = 1518482790. Its totient is φ = 506160928.

The previous prime is 1012321841. The next prime is 1012321859. The reversal of 1012321858 is 8581232101.

1012321858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 927994369 + 84327489 = 30463^2 + 9183^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (1012321859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253080463 + ... + 253080466.

Almost surely, 2^1012321858 is an apocalyptic number.

1012321858 is a deficient number, since it is larger than the sum of its proper divisors (506160932).

1012321858 is an equidigital number, since it uses as much as digits as its factorization.

1012321858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506160931.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1012321858 is about 31817.0057987863. The cubic root of 1012321858 is about 1004.0905307434.

Adding to 1012321858 its reverse (8581232101), we get a palindrome (9593553959).

The spelling of 1012321858 in words is "one billion, twelve million, three hundred twenty-one thousand, eight hundred fifty-eight".