1231530634 has 4 divisors (see below), whose sum is σ = 1847295954. Its totient is φ = 615765316.

The previous prime is 1231530611. The next prime is 1231530649. The reversal of 1231530634 is 4360351321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1065043225 + 166487409 = 32635^2 + 12903^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307882657 + ... + 307882660.

Almost surely, 2^1231530634 is an apocalyptic number.

1231530634 is a deficient number, since it is larger than the sum of its proper divisors (615765320).

1231530634 is an equidigital number, since it uses as much as digits as its factorization.

1231530634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615765319.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1231530634 is about 35093.1707601351. The cubic root of 1231530634 is about 1071.8855256883.

Adding to 1231530634 its reverse (4360351321), we get a palindrome (5591881955).

The spelling of 1231530634 in words is "one billion, two hundred thirty-one million, five hundred thirty thousand, six hundred thirty-four".