1251201004 has 12 divisors (see below), whose sum is σ = 2189971728. Its totient is φ = 625494800.

The previous prime is 1251201001. The next prime is 1251201019. The reversal of 1251201004 is 4001021521.

It is not an unprimeable number, because it can be changed into a prime (1251201001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4134 + ... + 50194.

It is an arithmetic number, because the mean of its divisors is an integer number (182497644).

Almost surely, 2^1251201004 is an apocalyptic number.

It is an amenable number.

1251201004 is a deficient number, since it is larger than the sum of its proper divisors (938770724).

1251201004 is a wasteful number, since it uses less digits than its factorization.

1251201004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52856 (or 52854 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1251201004 is about 35372.3197429855. The cubic root of 1251201004 is about 1077.5622325406.

Adding to 1251201004 its reverse (4001021521), we get a palindrome (5252222525).

The spelling of 1251201004 in words is "one billion, two hundred fifty-one million, two hundred one thousand, four".