1401516252 has 18 divisors (see below), whose sum is σ = 3542721728. Its totient is φ = 467172072.

The previous prime is 1401516199. The next prime is 1401516257. The reversal of 1401516252 is 2526151041.

1401516252 is a `hidden beast` number, since 1 + 401 + 5 + 1 + 6 + 252 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401516257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19465468 + ... + 19465539.

Almost surely, 2^1401516252 is an apocalyptic number.

1401516252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1401516252 is an abundant number, since it is smaller than the sum of its proper divisors (2141205476).

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

1401516252 is a wasteful number, since it uses less digits than its factorization.

1401516252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38931017 (or 38931012 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1401516252 is about 37436.8301542745. The cubic root of 1401516252 is about 1119.0926569289.

Adding to 1401516252 its reverse (2526151041), we get a palindrome (3927667293).

It can be divided in two parts, 1401 and 516252, that added together give a triangular number (517653 = T₁₀₁₇).

The spelling of 1401516252 in words is "one billion, four hundred one million, five hundred sixteen thousand, two hundred fifty-two".