1423121525 has 24 divisors (see below), whose sum is σ = 2023412160. Its totient is φ = 972639360.

The previous prime is 1423121519. The next prime is 1423121551. The reversal of 1423121525 is 5251213241.

It is not a de Polignac number, because 1423121525 - 2⁴ = 1423121509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1423121494 and 1423121503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40481 + ... + 66969.

It is an arithmetic number, because the mean of its divisors is an integer number (84308840).

Almost surely, 2^1423121525 is an apocalyptic number.

It is an amenable number.

1423121525 is a deficient number, since it is larger than the sum of its proper divisors (600290635).

1423121525 is a wasteful number, since it uses less digits than its factorization.

1423121525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26813 (or 26808 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 1423121525 is about 37724.2829620392. The cubic root of 1423121525 is about 1124.8138687948.

Adding to 1423121525 its reverse (5251213241), we get a palindrome (6674334766).

The spelling of 1423121525 in words is "one billion, four hundred twenty-three million, one hundred twenty-one thousand, five hundred twenty-five".