1211570040 has 32 divisors (see below), whose sum is σ = 3634710480. Its totient is φ = 323085312.

The previous prime is 1211569999. The next prime is 1211570111. The reversal of 1211570040 is 400751121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211569989 and 1211570016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5048089 + ... + 5048328.

Almost surely, 2^1211570040 is an apocalyptic number.

1211570040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211570040 is an abundant number, since it is smaller than the sum of its proper divisors (2423140440).

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

1211570040 is a wasteful number, since it uses less digits than its factorization.

1211570040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10096431 (or 10096427 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 1211570040 is about 34807.6146841463. The cubic root of 1211570040 is about 1066.0629296146.

The spelling of 1211570040 in words is "one billion, two hundred eleven million, five hundred seventy thousand, forty".