1251403201 has 8 divisors (see below), whose sum is σ = 1340980704. Its totient is φ = 1163599680.

The previous prime is 1251403129. The next prime is 1251403211. The reversal of 1251403201 is 1023041521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1251403201 - 2⁹ = 1251402689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251403211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442035 + ... + 444856.

It is an arithmetic number, because the mean of its divisors is an integer number (167622588).

Almost surely, 2^1251403201 is an apocalyptic number.

It is an amenable number.

1251403201 is a deficient number, since it is larger than the sum of its proper divisors (89577503).

1251403201 is an equidigital number, since it uses as much as digits as its factorization.

1251403201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886991.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1251403201 is about 35375.1777522036. The cubic root of 1251403201 is about 1077.6202749373.

Adding to 1251403201 its reverse (1023041521), we get a palindrome (2274444722).

The spelling of 1251403201 in words is "one billion, two hundred fifty-one million, four hundred three thousand, two hundred one".