1421235072 has 128 divisors (see below), whose sum is σ = 4247239200. Its totient is φ = 473651712.

The previous prime is 1421235059. The next prime is 1421235089. The reversal of 1421235072 is 2705321241.

1421235072 is a `hidden beast` number, since 1 + 421 + 235 + 0 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277398 + ... + 282474.

Almost surely, 2^1421235072 is an apocalyptic number.

1421235072 is a gapful number since it is divisible by the number (12) 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 1421235072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123619600).

1421235072 is an abundant number, since it is smaller than the sum of its proper divisors (2826004128).

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

1421235072 is an frugal number, since it uses more digits than its factorization.

1421235072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112 (or 5082 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1421235072 is about 37699.2715048978. The cubic root of 1421235072 is about 1124.3166409911.

It can be divided in two parts, 14212 and 35072, that added together give a square (49284 = 222²).

The spelling of 1421235072 in words is "one billion, four hundred twenty-one million, two hundred thirty-five thousand, seventy-two".