1421521423 has 8 divisors (see below), whose sum is σ = 1710101120. Its totient is φ = 1154318040.

The previous prime is 1421521411. The next prime is 1421521433. The reversal of 1421521423 is 3241251241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1421521423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421521403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5343933 + ... + 5344198.

It is an arithmetic number, because the mean of its divisors is an integer number (213762640).

Almost surely, 2^1421521423 is an apocalyptic number.

1421521423 is a deficient number, since it is larger than the sum of its proper divisors (288579697).

1421521423 is a wasteful number, since it uses less digits than its factorization.

1421521423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10688157.

The product of its digits is 1920, while the sum is 25.

The square root of 1421521423 is about 37703.0691456279. The cubic root of 1421521423 is about 1124.3921451732.

Adding to 1421521423 its reverse (3241251241), we get a palindrome (4662772664).

The spelling of 1421521423 in words is "one billion, four hundred twenty-one million, five hundred twenty-one thousand, four hundred twenty-three".