1025251247 has 2 divisors, whose sum is σ = 1025251248. Its totient is φ = 1025251246.

The previous prime is 1025251187. The next prime is 1025251273. The reversal of 1025251247 is 7421525201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1025251247 - 2¹⁸ = 1024989103 is a prime.

It is a super-2 number, since 2×1025251247² = 2102280238950110018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025251847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512625623 + 512625624.

It is an arithmetic number, because the mean of its divisors is an integer number (512625624).

Almost surely, 2^1025251247 is an apocalyptic number.

1025251247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025251247 is an equidigital number, since it uses as much as digits as its factorization.

1025251247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 1025251247 is about 32019.5447656584. The cubic root of 1025251247 is about 1008.3472125100.

Adding to 1025251247 its reverse (7421525201), we get a palindrome (8446776448).

The spelling of 1025251247 in words is "one billion, twenty-five million, two hundred fifty-one thousand, two hundred forty-seven".