1203142511 has 2 divisors, whose sum is σ = 1203142512. Its totient is φ = 1203142510.

The previous prime is 1203142483. The next prime is 1203142531. The reversal of 1203142511 is 1152413021.

It is an a-pointer prime, because the next prime (1203142531) can be obtained adding 1203142511 to its sum of digits (20).

It is a strong prime.

It is an emirp because it is prime and its reverse (1152413021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203142511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203142531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601571255 + 601571256.

It is an arithmetic number, because the mean of its divisors is an integer number (601571256).

Almost surely, 2^1203142511 is an apocalyptic number.

1203142511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203142511 is an equidigital number, since it uses as much as digits as its factorization.

1203142511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1203142511 is about 34686.3447339151. The cubic root of 1203142511 is about 1063.5853762477.

Adding to 1203142511 its reverse (1152413021), we get a palindrome (2355555532).

The spelling of 1203142511 in words is "one billion, two hundred three million, one hundred forty-two thousand, five hundred eleven".