1253661326 has 4 divisors (see below), whose sum is σ = 1880491992. Its totient is φ = 626830662.

The previous prime is 1253661301. The next prime is 1253661347. The reversal of 1253661326 is 6231663521.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313415330 + ... + 313415333.

It is an arithmetic number, because the mean of its divisors is an integer number (470122998).

Almost surely, 2^1253661326 is an apocalyptic number.

1253661326 is a deficient number, since it is larger than the sum of its proper divisors (626830666).

1253661326 is an equidigital number, since it uses as much as digits as its factorization.

1253661326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626830665.

The product of its digits is 38880, while the sum is 35.

The square root of 1253661326 is about 35407.0801676727. The cubic root of 1253661326 is about 1078.2680648414.

The spelling of 1253661326 in words is "one billion, two hundred fifty-three million, six hundred sixty-one thousand, three hundred twenty-six".