1250400321 has 15 divisors (see below), whose sum is σ = 1868357491. Its totient is φ = 833388048.

The previous prime is 1250400299. The next prime is 1250400373. The reversal of 1250400321 is 1230040521.

The square root of 1250400321 is 35361.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 177182721 + 1073217600 = 13311^2 + 32760^2 .

It is not a de Polignac number, because 1250400321 - 2⁵ = 1250400289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1250400294 and 1250400303.

It is not an unprimeable number, because it can be changed into a prime (1250408321) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 316285 + ... + 320213.

Almost surely, 2^1250400321 is an apocalyptic number.

1250400321 is the 35361-st square number.

1250400321 is the 17681-st centered octagonal number.

It is an amenable number.

1250400321 is a deficient number, since it is larger than the sum of its proper divisors (617957170).

1250400321 is an frugal number, since it uses more digits than its factorization.

1250400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7870 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The cubic root of 1250400321 is about 1077.3323281354.

Adding to 1250400321 its reverse (1230040521), we get a palindrome (2480440842).

The spelling of 1250400321 in words is "one billion, two hundred fifty million, four hundred thousand, three hundred twenty-one".