1253443605 has 16 divisors (see below), whose sum is σ = 2009909184. Its totient is φ = 667036800.

The previous prime is 1253443567. The next prime is 1253443663. The reversal of 1253443605 is 5063443521.

It is not a de Polignac number, because 1253443605 - 2¹⁰ = 1253442581 is a prime.

It is a super-2 number, since 2×1253443605² = 3142241741830792050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84571 + ... + 98280.

It is an arithmetic number, because the mean of its divisors is an integer number (125619324).

Almost surely, 2^1253443605 is an apocalyptic number.

1253443605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1253443605 is a deficient number, since it is larger than the sum of its proper divisors (756465579).

1253443605 is a wasteful number, since it uses less digits than its factorization.

1253443605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183316.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 1253443605 is about 35404.0054937291. The cubic root of 1253443605 is about 1078.2056409666.

The spelling of 1253443605 in words is "one billion, two hundred fifty-three million, four hundred forty-three thousand, six hundred five".