1455217140 has 96 divisors (see below), whose sum is σ = 4407742080. Its totient is φ = 356599296.

The previous prime is 1455217081. The next prime is 1455217157. The reversal of 1455217140 is 417125541.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1455217098 and 1455217107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174547 + ... + 182693.

It is an arithmetic number, because the mean of its divisors is an integer number (45913980).

Almost surely, 2^1455217140 is an apocalyptic number.

1455217140 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 1455217140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2203871040).

1455217140 is an abundant number, since it is smaller than the sum of its proper divisors (2952524940).

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

1455217140 is a wasteful number, since it uses less digits than its factorization.

1455217140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8401 (or 8399 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 1455217140 is about 38147.3084240553. The cubic root of 1455217140 is about 1133.2070484048.

The spelling of 1455217140 in words is "one billion, four hundred fifty-five million, two hundred seventeen thousand, one hundred forty".