1625460461 has 2 divisors, whose sum is σ = 1625460462. Its totient is φ = 1625460460.

The previous prime is 1625460449. The next prime is 1625460533. The reversal of 1625460461 is 1640645261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1622881225 + 2579236 = 40285^2 + 1606^2 .

It is an emirp because it is prime and its reverse (1640645261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1625460461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625465461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812730230 + 812730231.

It is an arithmetic number, because the mean of its divisors is an integer number (812730231).

Almost surely, 2^1625460461 is an apocalyptic number.

It is an amenable number.

1625460461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625460461 is an equidigital number, since it uses as much as digits as its factorization.

1625460461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1625460461 is about 40316.9996527519. Note that the first 3 decimals coincide. The cubic root of 1625460461 is about 1175.7783793140.

The spelling of 1625460461 in words is "one billion, six hundred twenty-five million, four hundred sixty thousand, four hundred sixty-one".