1012605621 has 8 divisors (see below), whose sum is σ = 1369157184. Its totient is φ = 665562240.

The previous prime is 1012605617. The next prime is 1012605631. The reversal of 1012605621 is 1265062101.

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

It is not a de Polignac number, because 1012605621 - 2² = 1012605617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012605591 and 1012605600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012605631) 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, 2376796 + ... + 2377221.

It is an arithmetic number, because the mean of its divisors is an integer number (171144648).

Almost surely, 2^1012605621 is an apocalyptic number.

It is an amenable number.

1012605621 is a deficient number, since it is larger than the sum of its proper divisors (356551563).

1012605621 is an equidigital number, since it uses as much as digits as its factorization.

1012605621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754091.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1012605621 is about 31821.4647840102. The cubic root of 1012605621 is about 1004.1843405401.

Adding to 1012605621 its reverse (1265062101), we get a palindrome (2277667722).

The spelling of 1012605621 in words is "one billion, twelve million, six hundred five thousand, six hundred twenty-one".