1204240251 has 32 divisors (see below), whose sum is σ = 1665589248. Its totient is φ = 773517600.

The previous prime is 1204240249. The next prime is 1204240253. The reversal of 1204240251 is 1520424021.

It is an interprime number because it is at equal distance from previous prime (1204240249) and next prime (1204240253).

It is not a de Polignac number, because 1204240251 - 2¹ = 1204240249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1204240253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3470260 + ... + 3470606.

It is an arithmetic number, because the mean of its divisors is an integer number (52049664).

Almost surely, 2^1204240251 is an apocalyptic number.

1204240251 is a deficient number, since it is larger than the sum of its proper divisors (461348997).

1204240251 is a wasteful number, since it uses less digits than its factorization.

1204240251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1204240251 is about 34702.1649324649. The cubic root of 1204240251 is about 1063.9087475564.

Adding to 1204240251 its reverse (1520424021), we get a palindrome (2724664272).

The spelling of 1204240251 in words is "one billion, two hundred four million, two hundred forty thousand, two hundred fifty-one".