746000021 has 16 divisors (see below), whose sum is σ = 849273600. Its totient is φ = 649591488.

The previous prime is 745999999. The next prime is 746000029. The reversal of 746000021 is 120000647.

It is not a de Polignac number, because 746000021 - 2²² = 741805717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745999957 and 746000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (746000029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52715 + ... + 65351.

It is an arithmetic number, because the mean of its divisors is an integer number (53079600).

Almost surely, 2^746000021 is an apocalyptic number.

It is an amenable number.

746000021 is a deficient number, since it is larger than the sum of its proper divisors (103273579).

746000021 is a wasteful number, since it uses less digits than its factorization.

746000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12908.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 746000021 is about 27313.0009519276. Note that the first 3 decimals coincide. The cubic root of 746000021 is about 906.9422065838.

Adding to 746000021 its reverse (120000647), we get a palindrome (866000668).

The spelling of 746000021 in words is "seven hundred forty-six million, twenty-one", and thus it is an aban number.