1201264420 has 24 divisors (see below), whose sum is σ = 2536600248. Its totient is φ = 477849600.

The previous prime is 1201264403. The next prime is 1201264483. The reversal of 1201264420 is 244621021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 54493924 + 1146770496 = 7382^2 + 33864^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1201264391 and 1201264400.

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, 162301 + ... + 169540.

It is an arithmetic number, because the mean of its divisors is an integer number (105691677).

Almost surely, 2^1201264420 is an apocalyptic number.

1201264420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201264420 is an abundant number, since it is smaller than the sum of its proper divisors (1335335828).

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

1201264420 is a wasteful number, since it uses less digits than its factorization.

1201264420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332031 (or 332029 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1201264420 is about 34659.2616770756. The cubic root of 1201264420 is about 1063.0316733765.

Adding to 1201264420 its reverse (244621021), we get a palindrome (1445885441).

The spelling of 1201264420 in words is "one billion, two hundred one million, two hundred sixty-four thousand, four hundred twenty".