1253539541 has 2 divisors, whose sum is σ = 1253539542. Its totient is φ = 1253539540.

The previous prime is 1253539501. The next prime is 1253539543. The reversal of 1253539541 is 1459353521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 948024100 + 305515441 = 30790^2 + 17479^2 .

It is an emirp because it is prime and its reverse (1459353521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253539541 - 2²⁶ = 1186430677 is a prime.

It is a super-2 number, since 2×1253539541² = 3142722761700981362, which contains 22 as substring.

Together with 1253539543, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1253539495 and 1253539504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253539543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626769770 + 626769771.

It is an arithmetic number, because the mean of its divisors is an integer number (626769771).

Almost surely, 2^1253539541 is an apocalyptic number.

It is an amenable number.

1253539541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253539541 is an equidigital number, since it uses as much as digits as its factorization.

1253539541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The square root of 1253539541 is about 35405.3603427504. The cubic root of 1253539541 is about 1078.2331481469.

The spelling of 1253539541 in words is "one billion, two hundred fifty-three million, five hundred thirty-nine thousand, five hundred forty-one".