1025461691 has 2 divisors, whose sum is σ = 1025461692. Its totient is φ = 1025461690.

The previous prime is 1025461643. The next prime is 1025461727. The reversal of 1025461691 is 1961645201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025461691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025461621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512730845 + 512730846.

It is an arithmetic number, because the mean of its divisors is an integer number (512730846).

Almost surely, 2^1025461691 is an apocalyptic number.

1025461691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025461691 is an equidigital number, since it uses as much as digits as its factorization.

1025461691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1025461691 is about 32022.8307774313. The cubic root of 1025461691 is about 1008.4161992110.

The spelling of 1025461691 in words is "one billion, twenty-five million, four hundred sixty-one thousand, six hundred ninety-one".