1421135525 has 6 divisors (see below), whose sum is σ = 1762208082. Its totient is φ = 1136908400.

The previous prime is 1421135501. The next prime is 1421135539. The reversal of 1421135525 is 5255311241.

It can be written as a sum of positive squares in 3 ways, for example, as 219958561 + 1201176964 = 14831^2 + 34658^2 .

It is not a de Polignac number, because 1421135525 - 2²⁴ = 1404358309 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 28422686 + ... + 28422735.

It is an arithmetic number, because the mean of its divisors is an integer number (293701347).

Almost surely, 2^1421135525 is an apocalyptic number.

It is an amenable number.

1421135525 is a deficient number, since it is larger than the sum of its proper divisors (341072557).

1421135525 is an equidigital number, since it uses as much as digits as its factorization.

1421135525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56845431 (or 56845426 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 1421135525 is about 37697.9512042763. The cubic root of 1421135525 is about 1124.2903903579.

Adding to 1421135525 its reverse (5255311241), we get a palindrome (6676446766).

The spelling of 1421135525 in words is "one billion, four hundred twenty-one million, one hundred thirty-five thousand, five hundred twenty-five".