1015240253 has 2 divisors, whose sum is σ = 1015240254. Its totient is φ = 1015240252.

The previous prime is 1015240211. The next prime is 1015240283. The reversal of 1015240253 is 3520425101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704000089 + 311240164 = 26533^2 + 17642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1015240253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1015240283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507620126 + 507620127.

It is an arithmetic number, because the mean of its divisors is an integer number (507620127).

Almost surely, 2^1015240253 is an apocalyptic number.

It is an amenable number.

1015240253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1015240253 is an equidigital number, since it uses as much as digits as its factorization.

1015240253 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 23.

The square root of 1015240253 is about 31862.8349805851. The cubic root of 1015240253 is about 1005.0544933860.

Adding to 1015240253 its reverse (3520425101), we get a palindrome (4535665354).

It can be divided in two parts, 10152 and 40253, that added together give a palindrome (50405).

The spelling of 1015240253 in words is "one billion, fifteen million, two hundred forty thousand, two hundred fifty-three".