1421266645 has 16 divisors (see below), whose sum is σ = 1732890240. Its totient is φ = 1118804544.

The previous prime is 1421266549. The next prime is 1421266661. The reversal of 1421266645 is 5466621241.

It is a cyclic number.

It is not a de Polignac number, because 1421266645 - 2¹⁹ = 1420742357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407971 + ... + 411439.

It is an arithmetic number, because the mean of its divisors is an integer number (108305640).

Almost surely, 2^1421266645 is an apocalyptic number.

It is an amenable number.

1421266645 is a deficient number, since it is larger than the sum of its proper divisors (311623595).

1421266645 is a wasteful number, since it uses less digits than its factorization.

1421266645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764.

The product of its digits is 69120, while the sum is 37.

The square root of 1421266645 is about 37699.6902507169. The cubic root of 1421266645 is about 1124.3249665635.

Adding to 1421266645 its reverse (5466621241), we get a palindrome (6887887886).

The spelling of 1421266645 in words is "one billion, four hundred twenty-one million, two hundred sixty-six thousand, six hundred forty-five".