1421123225 has 6 divisors (see below), whose sum is σ = 1762192830. Its totient is φ = 1136898560.

The previous prime is 1421123219. The next prime is 1421123233. The reversal of 1421123225 is 5223211241.

It can be written as a sum of positive squares in 3 ways, for example, as 737881 + 1420385344 = 859^2 + 37688^2 .

It is not a de Polignac number, because 1421123225 - 2¹² = 1421119129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1421123225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28422440 + ... + 28422489.

It is an arithmetic number, because the mean of its divisors is an integer number (293698805).

Almost surely, 2^1421123225 is an apocalyptic number.

It is an amenable number.

1421123225 is a deficient number, since it is larger than the sum of its proper divisors (341069605).

1421123225 is an equidigital number, since it uses as much as digits as its factorization.

1421123225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56844939 (or 56844934 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 1421123225 is about 37697.7880650841. The cubic root of 1421123225 is about 1124.2871467518.

Adding to 1421123225 its reverse (5223211241), we get a palindrome (6644334466).

The spelling of 1421123225 in words is "one billion, four hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-five".