745410121 has 2 divisors, whose sum is σ = 745410122. Its totient is φ = 745410120.

The previous prime is 745410079. The next prime is 745410131. The reversal of 745410121 is 121014547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 658640896 + 86769225 = 25664^2 + 9315^2 .

It is an emirp because it is prime and its reverse (121014547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 745410121 - 2⁷ = 745409993 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (745410131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372705060 + 372705061.

It is an arithmetic number, because the mean of its divisors is an integer number (372705061).

Almost surely, 2^745410121 is an apocalyptic number.

It is an amenable number.

745410121 is a deficient number, since it is larger than the sum of its proper divisors (1).

745410121 is an equidigital number, since it uses as much as digits as its factorization.

745410121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 745410121 is about 27302.1999296760. The cubic root of 745410121 is about 906.7030884993.

Adding to 745410121 its reverse (121014547), we get a palindrome (866424668).

The spelling of 745410121 in words is "seven hundred forty-five million, four hundred ten thousand, one hundred twenty-one".