1266424621 has 16 divisors (see below), whose sum is σ = 1580059008. Its totient is φ = 986112000.

The previous prime is 1266424619. The next prime is 1266424633. The reversal of 1266424621 is 1264246621.

It is a cyclic number.

It is not a de Polignac number, because 1266424621 - 2¹ = 1266424619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266424661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118141 + ... + 128413.

It is an arithmetic number, because the mean of its divisors is an integer number (98753688).

Almost surely, 2^1266424621 is an apocalyptic number.

1266424621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1266424621 is a deficient number, since it is larger than the sum of its proper divisors (313634387).

1266424621 is a wasteful number, since it uses less digits than its factorization.

1266424621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11892.

The product of its digits is 27648, while the sum is 34.

The square root of 1266424621 is about 35586.8602295847. The cubic root of 1266424621 is about 1081.9149328425.

The spelling of 1266424621 in words is "one billion, two hundred sixty-six million, four hundred twenty-four thousand, six hundred twenty-one".