1401002120 has 48 divisors (see below), whose sum is σ = 3666913740. Its totient is φ = 480342912.

The previous prime is 1401002089. The next prime is 1401002129. The reversal of 1401002120 is 212001041.

It can be written as a sum of positive squares in 2 ways, for example, as 1379528164 + 21473956 = 37142^2 + 4634^2 .

It is not an unprimeable number, because it can be changed into a prime (1401002129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355439 + ... + 359358.

Almost surely, 2^1401002120 is an apocalyptic number.

1401002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401002120 is an abundant number, since it is smaller than the sum of its proper divisors (2265911620).

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

1401002120 is a wasteful number, since it uses less digits than its factorization.

1401002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714822 (or 714811 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1401002120 is about 37429.9628639944. The cubic root of 1401002120 is about 1118.9557976014.

Adding to 1401002120 its reverse (212001041), we get a palindrome (1613003161).

The spelling of 1401002120 in words is "one billion, four hundred one million, two thousand, one hundred twenty".