1143155401 has 2 divisors, whose sum is σ = 1143155402. Its totient is φ = 1143155400.

The previous prime is 1143155389. The next prime is 1143155413. The reversal of 1143155401 is 1045513411.

It is a balanced prime because it is at equal distance from previous prime (1143155389) and next prime (1143155413).

It can be written as a sum of positive squares in only one way, i.e., 825068176 + 318087225 = 28724^2 + 17835^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143155401 - 2⁵ = 1143155369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143150401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571577700 + 571577701.

It is an arithmetic number, because the mean of its divisors is an integer number (571577701).

Almost surely, 2^1143155401 is an apocalyptic number.

It is an amenable number.

1143155401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143155401 is an equidigital number, since it uses as much as digits as its factorization.

1143155401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1143155401 is about 33810.5811987904. The cubic root of 1143155401 is about 1045.6068607156.

Adding to 1143155401 its reverse (1045513411), we get a palindrome (2188668812).

It can be divided in two parts, 114315 and 5401, that added together give a square (119716 = 346²).

The spelling of 1143155401 in words is "one billion, one hundred forty-three million, one hundred fifty-five thousand, four hundred one".