1421351125 has 16 divisors (see below), whose sum is σ = 1850973696. Its totient is φ = 1087640400.

The previous prime is 1421351089. The next prime is 1421351149. The reversal of 1421351125 is 5211531241.

It is not a de Polignac number, because 1421351125 - 2¹¹ = 1421349077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421351125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244317 + ... + 250066.

It is an arithmetic number, because the mean of its divisors is an integer number (115685856).

Almost surely, 2^1421351125 is an apocalyptic number.

It is an amenable number.

1421351125 is a deficient number, since it is larger than the sum of its proper divisors (429622571).

1421351125 is an equidigital number, since it uses as much as digits as its factorization.

1421351125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494421 (or 494411 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 1421351125 is about 37700.8106676766. The cubic root of 1421351125 is about 1124.3472427239.

Adding to 1421351125 its reverse (5211531241), we get a palindrome (6632882366).

The spelling of 1421351125 in words is "one billion, four hundred twenty-one million, three hundred fifty-one thousand, one hundred twenty-five".