1251250323541 has 2 divisors, whose sum is σ = 1251250323542. Its totient is φ = 1251250323540.

The previous prime is 1251250323467. The next prime is 1251250323593. The reversal of 1251250323541 is 1453230521521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1248759315441 + 2491008100 = 1117479^2 + 49910^2 .

It is an emirp because it is prime and its reverse (1453230521521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1251250323541 - 2⁷ = 1251250323413 is a prime.

It is a super-2 number, since 2×1251250323541² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1251250323497 and 1251250323506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251250323941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625625161770 + 625625161771.

It is an arithmetic number, because the mean of its divisors is an integer number (625625161771).

Almost surely, 2^{1251250323541} is an apocalyptic number.

It is an amenable number.

1251250323541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251250323541 is an equidigital number, since it uses as much as digits as its factorization.

1251250323541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 1251250323541 in words is "one trillion, two hundred fifty-one billion, two hundred fifty million, three hundred twenty-three thousand, five hundred forty-one".