1201220424 has 24 divisors (see below), whose sum is σ = 3253305510. Its totient is φ = 400406784.

The previous prime is 1201220411. The next prime is 1201220431. The reversal of 1201220424 is 4240221021.

1201220424 is a `hidden beast` number, since 1 + 20 + 1 + 220 + 424 = 666.

It can be written as a sum of positive squares in only one way, i.e., 938196900 + 263023524 = 30630^2 + 16218^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1201220397 and 1201220406.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8341737 + ... + 8341880.

Almost surely, 2^1201220424 is an apocalyptic number.

It is an amenable number.

1201220424 is an abundant number, since it is smaller than the sum of its proper divisors (2052085086).

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

1201220424 is a wasteful number, since it uses less digits than its factorization.

1201220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16683629 (or 16683622 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1201220424 is about 34658.6269779978. The cubic root of 1201220424 is about 1063.0186954643.

Adding to 1201220424 its reverse (4240221021), we get a palindrome (5441441445).

The spelling of 1201220424 in words is "one billion, two hundred one million, two hundred twenty thousand, four hundred twenty-four".