1201630256 has 10 divisors (see below), whose sum is σ = 2328158652. Its totient is φ = 600815120.

The previous prime is 1201630253. The next prime is 1201630273. The reversal of 1201630256 is 6520361021.

It is not an unprimeable number, because it can be changed into a prime (1201630253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37550930 + ... + 37550961.

Almost surely, 2^1201630256 is an apocalyptic number.

1201630256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1201630256 is a deficient number, since it is larger than the sum of its proper divisors (1126528396).

1201630256 is an equidigital number, since it uses as much as digits as its factorization.

1201630256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75101899 (or 75101893 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1201630256 is about 34664.5388834180. The cubic root of 1201630256 is about 1063.1395751776.

Adding to 1201630256 its reverse (6520361021), we get a palindrome (7721991277).

The spelling of 1201630256 in words is "one billion, two hundred one million, six hundred thirty thousand, two hundred fifty-six".