1401816725 has 12 divisors (see below), whose sum is σ = 1742299200. Its totient is φ = 1118842800.

The previous prime is 1401816709. The next prime is 1401816749. The reversal of 1401816725 is 5276181041.

It is not a de Polignac number, because 1401816725 - 2⁴ = 1401816709 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54275 + ... + 75824.

It is an arithmetic number, because the mean of its divisors is an integer number (145191600).

Almost surely, 2^1401816725 is an apocalyptic number.

It is an amenable number.

1401816725 is a deficient number, since it is larger than the sum of its proper divisors (340482475).

1401816725 is a wasteful number, since it uses less digits than its factorization.

1401816725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130540 (or 130535 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 1401816725 is about 37440.8430060008. The cubic root of 1401816725 is about 1119.1726258198.

Adding to 1401816725 its reverse (5276181041), we get a palindrome (6677997766).

The spelling of 1401816725 in words is "one billion, four hundred one million, eight hundred sixteen thousand, seven hundred twenty-five".