1421669760 has 256 divisors, whose sum is σ = 5223052800. Its totient is φ = 322191360.

The previous prime is 1421669747. The next prime is 1421669779. The reversal of 1421669760 is 679661241.

It is a super-2 number, since 2×1421669760² = 4042289812996915200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1867780 + ... + 1868540.

It is an arithmetic number, because the mean of its divisors is an integer number (20402550).

Almost surely, 2^1421669760 is an apocalyptic number.

1421669760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421669760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2611526400).

1421669760 is an abundant number, since it is smaller than the sum of its proper divisors (3801383040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421669760 is a wasteful number, since it uses less digits than its factorization.

1421669760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 1421669760 is about 37705.0362683820. The cubic root of 1421669760 is about 1124.4312542464.

The spelling of 1421669760 in words is "one billion, four hundred twenty-one million, six hundred sixty-nine thousand, seven hundred sixty".