1421506623 has 16 divisors (see below), whose sum is σ = 1921836672. Its totient is φ = 934500000.

The previous prime is 1421506609. The next prime is 1421506627. The reversal of 1421506623 is 3266051241.

It is not a de Polignac number, because 1421506623 - 2¹² = 1421502527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421506627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66708 + ... + 85398.

It is an arithmetic number, because the mean of its divisors is an integer number (120114792).

Almost surely, 2^1421506623 is an apocalyptic number.

1421506623 is a deficient number, since it is larger than the sum of its proper divisors (500330049).

1421506623 is a wasteful number, since it uses less digits than its factorization.

1421506623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19046.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1421506623 is about 37702.8728746232. The cubic root of 1421506623 is about 1124.3882430016.

Adding to 1421506623 its reverse (3266051241), we get a palindrome (4687557864).

The spelling of 1421506623 in words is "one billion, four hundred twenty-one million, five hundred six thousand, six hundred twenty-three".