1421872650 has 288 divisors, whose sum is σ = 4492837440. Its totient is φ = 327888000.

The previous prime is 1421872631. The next prime is 1421872687. The reversal of 1421872650 is 562781241.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7855560 + ... + 7855740.

It is an arithmetic number, because the mean of its divisors is an integer number (15600130).

Almost surely, 2^1421872650 is an apocalyptic number.

1421872650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421872650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2246418720).

1421872650 is an abundant number, since it is smaller than the sum of its proper divisors (3070964790).

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

1421872650 is a wasteful number, since it uses less digits than its factorization.

1421872650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 1421872650 is about 37707.7266617864. The cubic root of 1421872650 is about 1124.4847418218.

It can be divided in two parts, 14218 and 72650, that added together give a palindrome (86868).

The spelling of 1421872650 in words is "one billion, four hundred twenty-one million, eight hundred seventy-two thousand, six hundred fifty".