1461717251 has 2 divisors, whose sum is σ = 1461717252. Its totient is φ = 1461717250.

The previous prime is 1461717223. The next prime is 1461717259. The reversal of 1461717251 is 1527171641.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1461717251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1461717259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730858625 + 730858626.

It is an arithmetic number, because the mean of its divisors is an integer number (730858626).

Almost surely, 2^1461717251 is an apocalyptic number.

1461717251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461717251 is an equidigital number, since it uses as much as digits as its factorization.

1461717251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 35.

The square root of 1461717251 is about 38232.4110016619. The cubic root of 1461717251 is about 1134.8917984402.

Adding to 1461717251 its reverse (1527171641), we get a palindrome (2988888892).

The spelling of 1461717251 in words is "one billion, four hundred sixty-one million, seven hundred seventeen thousand, two hundred fifty-one".