1251403223 has 8 divisors (see below), whose sum is σ = 1430395392. Its totient is φ = 1072466136.

The previous prime is 1251403211. The next prime is 1251403259. The reversal of 1251403223 is 3223041521.

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

It is not a de Polignac number, because 1251403223 - 2⁸ = 1251402967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251403523) 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, 64886 + ... + 81932.

It is an arithmetic number, because the mean of its divisors is an integer number (178799424).

Almost surely, 2^1251403223 is an apocalyptic number.

1251403223 is a deficient number, since it is larger than the sum of its proper divisors (178992169).

1251403223 is a wasteful number, since it uses less digits than its factorization.

1251403223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27541.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1251403223 is about 35375.1780631561. The cubic root of 1251403223 is about 1077.6202812522.

Adding to 1251403223 its reverse (3223041521), we get a palindrome (4474444744).

The spelling of 1251403223 in words is "one billion, two hundred fifty-one million, four hundred three thousand, two hundred twenty-three".