741570821 has 6 divisors (see below), whose sum is σ = 787758930. Its totient is φ = 697948736.

The previous prime is 741570793. The next prime is 741570829. The reversal of 741570821 is 128075147.

It can be written as a sum of positive squares in 3 ways, for example, as 374848321 + 366722500 = 19361^2 + 19150^2 .

It is not a de Polignac number, because 741570821 - 2¹⁸ = 741308677 is a prime.

It is a super-2 number, since 2×741570821² = 1099854565117228082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (741570829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1282706 + ... + 1283283.

It is an arithmetic number, because the mean of its divisors is an integer number (131293155).

Almost surely, 2^741570821 is an apocalyptic number.

It is an amenable number.

741570821 is a deficient number, since it is larger than the sum of its proper divisors (46188109).

741570821 is a wasteful number, since it uses less digits than its factorization.

741570821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566023 (or 2566006 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 741570821 is about 27231.7979758958. The cubic root of 741570821 is about 905.1437237018.

The spelling of 741570821 in words is "seven hundred forty-one million, five hundred seventy thousand, eight hundred twenty-one".