1072620021 has 8 divisors (see below), whose sum is σ = 1560174624. Its totient is φ = 650072720.

The previous prime is 1072620007. The next prime is 1072620067. The reversal of 1072620021 is 1200262701.

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

It is not a de Polignac number, because 1072620021 - 2¹⁹ = 1072095733 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1072620021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072621021) 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, 16251786 + ... + 16251851.

It is an arithmetic number, because the mean of its divisors is an integer number (195021828).

Almost surely, 2^1072620021 is an apocalyptic number.

1072620021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1072620021 is a deficient number, since it is larger than the sum of its proper divisors (487554603).

1072620021 is a wasteful number, since it uses less digits than its factorization.

1072620021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32503651.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1072620021 is about 32750.8781714323. The cubic root of 1072620021 is about 1023.6432641669.

Adding to 1072620021 its reverse (1200262701), we get a palindrome (2272882722).

The spelling of 1072620021 in words is "one billion, seventy-two million, six hundred twenty thousand, twenty-one".