1201547440 has 20 divisors (see below), whose sum is σ = 2793597984. Its totient is φ = 480618944.

The previous prime is 1201547429. The next prime is 1201547467. The reversal of 1201547440 is 447451021.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1201547399 and 1201547408.

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, 7509592 + ... + 7509751.

Almost surely, 2^1201547440 is an apocalyptic number.

1201547440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201547440 is an abundant number, since it is smaller than the sum of its proper divisors (1592050544).

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

1201547440 is a wasteful number, since it uses less digits than its factorization.

1201547440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15019356 (or 15019350 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 1201547440 is about 34663.3443279785. The cubic root of 1201547440 is about 1063.1151508620.

Adding to 1201547440 its reverse (447451021), we get a palindrome (1648998461).

The spelling of 1201547440 in words is "one billion, two hundred one million, five hundred forty-seven thousand, four hundred forty".