1402121424 has 80 divisors (see below), whose sum is σ = 3961978560. Its totient is φ = 423751680.

The previous prime is 1402121411. The next prime is 1402121443. The reversal of 1402121424 is 4241212041.

It is a self number, because there is not a number n which added to its sum of digits gives 1402121424.

It is a congruent number.

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, 206272 + ... + 212960.

It is an arithmetic number, because the mean of its divisors is an integer number (49524732).

Almost surely, 2^1402121424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1402121424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1980989280).

1402121424 is an abundant number, since it is smaller than the sum of its proper divisors (2559857136).

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

1402121424 is a wasteful number, since it uses less digits than its factorization.

1402121424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108 (or 7102 counting only the distinct ones).

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

The square root of 1402121424 is about 37444.9118572871. The cubic root of 1402121424 is about 1119.2537077638.

Adding to 1402121424 its reverse (4241212041), we get a palindrome (5643333465).

The spelling of 1402121424 in words is "one billion, four hundred two million, one hundred twenty-one thousand, four hundred twenty-four".