1421907725 has 72 divisors (see below), whose sum is σ = 2164504320. Its totient is φ = 922078080.

The previous prime is 1421907719. The next prime is 1421907763. The reversal of 1421907725 is 5277091241.

It is a happy number.

It is not a de Polignac number, because 1421907725 - 2⁶ = 1421907661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3070844 + ... + 3071306.

It is an arithmetic number, because the mean of its divisors is an integer number (30062560).

Almost surely, 2^1421907725 is an apocalyptic number.

It is an amenable number.

1421907725 is a deficient number, since it is larger than the sum of its proper divisors (742596595).

1421907725 is a wasteful number, since it uses less digits than its factorization.

1421907725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 1421907725 is about 37708.1917492738. The cubic root of 1421907725 is about 1124.4939880737.

Adding to 1421907725 its reverse (5277091241), we get a palindrome (6698998966).

The spelling of 1421907725 in words is "one billion, four hundred twenty-one million, nine hundred seven thousand, seven hundred twenty-five".