1251503053 has 2 divisors, whose sum is σ = 1251503054. Its totient is φ = 1251503052.

The previous prime is 1251503017. The next prime is 1251503081. The reversal of 1251503053 is 3503051521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 710382409 + 541120644 = 26653^2 + 23262^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251503053 - 2¹³ = 1251494861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1251533053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625751526 + 625751527.

It is an arithmetic number, because the mean of its divisors is an integer number (625751527).

Almost surely, 2^1251503053 is an apocalyptic number.

It is an amenable number.

1251503053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251503053 is an equidigital number, since it uses as much as digits as its factorization.

1251503053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1251503053 is about 35376.5890526489. The cubic root of 1251503053 is about 1077.6489360109.

Adding to 1251503053 its reverse (3503051521), we get a palindrome (4754554574).

The spelling of 1251503053 in words is "one billion, two hundred fifty-one million, five hundred three thousand, fifty-three".