1155103421 has 2 divisors, whose sum is σ = 1155103422. Its totient is φ = 1155103420.

The previous prime is 1155103409. The next prime is 1155103427. The reversal of 1155103421 is 1243015511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155048196 + 55225 = 33986^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155103421 - 2³⁰ = 81361597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155103427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577551710 + 577551711.

It is an arithmetic number, because the mean of its divisors is an integer number (577551711).

Almost surely, 2^1155103421 is an apocalyptic number.

It is an amenable number.

1155103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155103421 is an equidigital number, since it uses as much as digits as its factorization.

1155103421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1155103421 is about 33986.8124571870. The cubic root of 1155103421 is about 1049.2370636183.

Adding to 1155103421 its reverse (1243015511), we get a palindrome (2398118932).

The spelling of 1155103421 in words is "one billion, one hundred fifty-five million, one hundred three thousand, four hundred twenty-one".