745540841 has 4 divisors (see below), whose sum is σ = 757762884. Its totient is φ = 733318800.

The previous prime is 745540823. The next prime is 745540849. The reversal of 745540841 is 148045547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31315216 + 714225625 = 5596^2 + 26725^2 .

It is a cyclic number.

It is not a de Polignac number, because 745540841 - 2²² = 741346537 is a prime.

It is a super-2 number, since 2×745540841² = 1111662291197974562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745540795 and 745540804.

It is not an unprimeable number, because it can be changed into a prime (745540849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6110930 + ... + 6111051.

It is an arithmetic number, because the mean of its divisors is an integer number (189440721).

Almost surely, 2^745540841 is an apocalyptic number.

It is an amenable number.

745540841 is a deficient number, since it is larger than the sum of its proper divisors (12222043).

745540841 is a wasteful number, since it uses less digits than its factorization.

745540841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222042.

The product of its (nonzero) digits is 89600, while the sum is 38.

The square root of 745540841 is about 27304.5937710122. The cubic root of 745540841 is about 906.7560871983.

The spelling of 745540841 in words is "seven hundred forty-five million, five hundred forty thousand, eight hundred forty-one".