1209575040 has 64 divisors (see below), whose sum is σ = 3855526560. Its totient is φ = 322552832.

The previous prime is 1209575021. The next prime is 1209575047. The reversal of 1209575040 is 405759021.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1209574992 and 1209575010.

It is not an unprimeable number, because it can be changed into a prime (1209575047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313074 + ... + 316913.

Almost surely, 2^1209575040 is an apocalyptic number.

1209575040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1209575040 is an abundant number, since it is smaller than the sum of its proper divisors (2645951520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209575040 is an equidigital number, since it uses as much as digits as its factorization.

1209575040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630009 (or 629997 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 1209575040 is about 34778.9453549126. The cubic root of 1209575040 is about 1065.4774733093.

The spelling of 1209575040 in words is "one billion, two hundred nine million, five hundred seventy-five thousand, forty".