740008121 has 2 divisors, whose sum is σ = 740008122. Its totient is φ = 740008120.

The previous prime is 740008117. The next prime is 740008169. The reversal of 740008121 is 121800047.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 645160000 + 94848121 = 25400^2 + 9739^2 .

It is an emirp because it is prime and its reverse (121800047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 740008121 - 2² = 740008117 is a prime.

It is a super-2 number, since 2×740008121² = 1095224038291901282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (740008111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370004060 + 370004061.

It is an arithmetic number, because the mean of its divisors is an integer number (370004061).

Almost surely, 2^740008121 is an apocalyptic number.

It is an amenable number.

740008121 is a deficient number, since it is larger than the sum of its proper divisors (1).

740008121 is an equidigital number, since it uses as much as digits as its factorization.

740008121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 740008121 is about 27203.0902840100. The cubic root of 740008121 is about 904.5074784130.

Adding to 740008121 its reverse (121800047), we get a palindrome (861808168).

The spelling of 740008121 in words is "seven hundred forty million, eight thousand, one hundred twenty-one".