1402121020 has 24 divisors (see below), whose sum is σ = 2965952304. Its totient is φ = 556753536.

The previous prime is 1402121003. The next prime is 1402121023. The reversal of 1402121020 is 201212041.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402121023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253122 + ... + 258601.

It is an arithmetic number, because the mean of its divisors is an integer number (123581346).

Almost surely, 2^1402121020 is an apocalyptic number.

1402121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1402121020 is an abundant number, since it is smaller than the sum of its proper divisors (1563831284).

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

1402121020 is a wasteful number, since it uses less digits than its factorization.

1402121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511869 (or 511867 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1402121020 is about 37444.9064626953. The cubic root of 1402121020 is about 1119.2536002651.

Adding to 1402121020 its reverse (201212041), we get a palindrome (1603333061).

The spelling of 1402121020 in words is "one billion, four hundred two million, one hundred twenty-one thousand, twenty".