7420654121 has 2 divisors, whose sum is σ = 7420654122. Its totient is φ = 7420654120.

The previous prime is 7420654061. The next prime is 7420654187. The reversal of 7420654121 is 1214560247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5930694121 + 1489960000 = 77011^2 + 38600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7420654121 is a prime.

It is a super-2 number, since 2×7420654121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7420659121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710327060 + 3710327061.

It is an arithmetic number, because the mean of its divisors is an integer number (3710327061).

Almost surely, 2^7420654121 is an apocalyptic number.

It is an amenable number.

7420654121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7420654121 is an equidigital number, since it uses as much as digits as its factorization.

7420654121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 7420654121 is about 86143.2186593930. The cubic root of 7420654121 is about 1950.5064755856.

The spelling of 7420654121 in words is "seven billion, four hundred twenty million, six hundred fifty-four thousand, one hundred twenty-one".