1253361805 has 16 divisors (see below), whose sum is σ = 1593768960. Its totient is φ = 942959872.

The previous prime is 1253361803. The next prime is 1253361821. The reversal of 1253361805 is 5081633521.

It is a cyclic number.

It is not a de Polignac number, because 1253361805 - 2¹ = 1253361803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253361803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117192 + ... + 127438.

It is an arithmetic number, because the mean of its divisors is an integer number (99610560).

Almost surely, 2^1253361805 is an apocalyptic number.

It is an amenable number.

1253361805 is a deficient number, since it is larger than the sum of its proper divisors (340407155).

1253361805 is a wasteful number, since it uses less digits than its factorization.

1253361805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11708.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1253361805 is about 35402.8502383636. The cubic root of 1253361805 is about 1078.1821858122.

The spelling of 1253361805 in words is "one billion, two hundred fifty-three million, three hundred sixty-one thousand, eight hundred five".