736741021 has 8 divisors (see below), whose sum is σ = 747050040. Its totient is φ = 726477312.

The previous prime is 736741007. The next prime is 736741051. The reversal of 736741021 is 120147637.

It can be written as a sum of positive squares in 4 ways, for example, as 186322500 + 550418521 = 13650^2 + 23461^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 736741021 - 2¹⁵ = 736708253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (736741001) 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, 22101 + ... + 44293.

It is an arithmetic number, because the mean of its divisors is an integer number (93381255).

Almost surely, 2^736741021 is an apocalyptic number.

It is an amenable number.

736741021 is a deficient number, since it is larger than the sum of its proper divisors (10309019).

736741021 is a wasteful number, since it uses less digits than its factorization.

736741021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22655.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 736741021 is about 27142.9736948625. The cubic root of 736741021 is about 903.1743957546.

Adding to 736741021 its reverse (120147637), we get a palindrome (856888658).

The spelling of 736741021 in words is "seven hundred thirty-six million, seven hundred forty-one thousand, twenty-one".