1421924 has 24 divisors (see below), whose sum is σ = 2912448. Its totient is φ = 594720.

The previous prime is 1421911. The next prime is 1421933. The reversal of 1421924 is 4291241.

It is a self number, because there is not a number n which added to its sum of digits gives 1421924.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614 + ... + 1794.

It is an arithmetic number, because the mean of its divisors is an integer number (121352).

2^1421924 is an apocalyptic number.

1421924 is a gapful number since it is divisible by the number (14) 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 1421924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1456224).

1421924 is an abundant number, since it is smaller than the sum of its proper divisors (1490524).

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

1421924 is a wasteful number, since it uses less digits than its factorization.

1421924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1233 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 1421924 is about 1192.4445479770. Note that the first 3 decimals coincide. The cubic root of 1421924 is about 112.4498278336.

It can be divided in two parts, 14 and 21924, that multiplied together give a triangular number (306936 = T₇₈₃).

The spelling of 1421924 in words is "one million, four hundred twenty-one thousand, nine hundred twenty-four".