7280121461 has 2 divisors, whose sum is σ = 7280121462. Its totient is φ = 7280121460.

The previous prime is 7280121449. The next prime is 7280121487. The reversal of 7280121461 is 1641210827.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7238776561 + 41344900 = 85081^2 + 6430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7280121461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7280121421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640060730 + 3640060731.

It is an arithmetic number, because the mean of its divisors is an integer number (3640060731).

Almost surely, 2^7280121461 is an apocalyptic number.

It is an amenable number.

7280121461 is a deficient number, since it is larger than the sum of its proper divisors (1).

7280121461 is an equidigital number, since it uses as much as digits as its factorization.

7280121461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 7280121461 is about 85323.6278002758. The cubic root of 7280121461 is about 1938.1149952017.

The spelling of 7280121461 in words is "seven billion, two hundred eighty million, one hundred twenty-one thousand, four hundred sixty-one".