1421165523 has 32 divisors (see below), whose sum is σ = 2017100800. Its totient is φ = 888765696.

The previous prime is 1421165521. The next prime is 1421165531. The reversal of 1421165523 is 3255611241.

It is not a de Polignac number, because 1421165523 - 2¹ = 1421165521 is a prime.

It is a super-2 number, since 2×1421165523² = 4039422887527727058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421165521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375183 + ... + 378951.

It is an arithmetic number, because the mean of its divisors is an integer number (63034400).

Almost surely, 2^1421165523 is an apocalyptic number.

1421165523 is a deficient number, since it is larger than the sum of its proper divisors (595935277).

1421165523 is a wasteful number, since it uses less digits than its factorization.

1421165523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931.

The product of its digits is 7200, while the sum is 30.

The square root of 1421165523 is about 37698.3490752579. The cubic root of 1421165523 is about 1124.2983009864.

Adding to 1421165523 its reverse (3255611241), we get a palindrome (4676776764).

The spelling of 1421165523 in words is "one billion, four hundred twenty-one million, one hundred sixty-five thousand, five hundred twenty-three".