1351404725261 has 2 divisors, whose sum is σ = 1351404725262. Its totient is φ = 1351404725260.

The previous prime is 1351404725249. The next prime is 1351404725273. The reversal of 1351404725261 is 1625274041531.

It is a balanced prime because it is at equal distance from previous prime (1351404725249) and next prime (1351404725273).

It can be written as a sum of positive squares in only one way, i.e., 1272426864361 + 78977860900 = 1128019^2 + 281030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351404725261 - 2⁶ = 1351404725197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1351404745261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675702362630 + 675702362631.

It is an arithmetic number, because the mean of its divisors is an integer number (675702362631).

Almost surely, 2^{1351404725261} is an apocalyptic number.

It is an amenable number.

1351404725261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351404725261 is an equidigital number, since it uses as much as digits as its factorization.

1351404725261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

Adding to 1351404725261 its reverse (1625274041531), we get a palindrome (2976678766792).

The spelling of 1351404725261 in words is "one trillion, three hundred fifty-one billion, four hundred four million, seven hundred twenty-five thousand, two hundred sixty-one".