1122400001540 has 48 divisors (see below), whose sum is σ = 2374121289792. Its totient is φ = 445712512896.

The previous prime is 1122400001519. The next prime is 1122400001621. The reversal of 1122400001540 is 451000042211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 2767022 + ... + 3146618.

It is an arithmetic number, because the mean of its divisors is an integer number (49460860204).

Almost surely, 2^{1122400001540} is an apocalyptic number.

1122400001540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122400001540 is an abundant number, since it is smaller than the sum of its proper divisors (1251721288252).

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

1122400001540 is a wasteful number, since it uses less digits than its factorization.

1122400001540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380676 (or 380674 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 1122400001540 its reverse (451000042211), we get a palindrome (1573400043751).

The spelling of 1122400001540 in words is "one trillion, one hundred twenty-two billion, four hundred million, one thousand, five hundred forty".