1200012040 has 16 divisors (see below), whose sum is σ = 2700027180. Its totient is φ = 480004800.

The previous prime is 1200012019. The next prime is 1200012053. The reversal of 1200012040 is 402100021.

It can be written as a sum of positive squares in 2 ways, for example, as 1156952196 + 43059844 = 34014^2 + 6562^2 .

It is a super-2 number, since 2×1200012040² = 2880057792289923200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15000111 + ... + 15000190.

Almost surely, 2^1200012040 is an apocalyptic number.

1200012040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200012040 is an abundant number, since it is smaller than the sum of its proper divisors (1500015140).

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

1200012040 is a wasteful number, since it uses less digits than its factorization.

1200012040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30000312 (or 30000308 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1200012040 is about 34641.1899333727. The cubic root of 1200012040 is about 1062.6621231733.

Adding to 1200012040 its reverse (402100021), we get a palindrome (1602112061).

The spelling of 1200012040 in words is "one billion, two hundred million, twelve thousand, forty".