1201421424 has 80 divisors (see below), whose sum is σ = 3578556672. Its totient is φ = 340214784.

The previous prime is 1201421423. The next prime is 1201421447. The reversal of 1201421424 is 4241241021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1201421424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201421423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22147 + ... + 53789.

Almost surely, 2^1201421424 is an apocalyptic number.

1201421424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201421424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1789278336).

1201421424 is an abundant number, since it is smaller than the sum of its proper divisors (2377135248).

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

1201421424 is a wasteful number, since it uses less digits than its factorization.

1201421424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31774 (or 31768 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1201421424 is about 34661.5265676513. The cubic root of 1201421424 is about 1063.0779837340.

Adding to 1201421424 its reverse (4241241021), we get a palindrome (5442662445).

The spelling of 1201421424 in words is "one billion, two hundred one million, four hundred twenty-one thousand, four hundred twenty-four".