1451381380 has 12 divisors (see below), whose sum is σ = 3047900940. Its totient is φ = 580552544.

The previous prime is 1451381377. The next prime is 1451381381. The reversal of 1451381380 is 831831541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 333281536 + 1118099844 = 18256^2 + 33438^2 .

It is not an unprimeable number, because it can be changed into a prime (1451381381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36284515 + ... + 36284554.

It is an arithmetic number, because the mean of its divisors is an integer number (253991745).

Almost surely, 2^1451381380 is an apocalyptic number.

1451381380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1451381380 is an abundant number, since it is smaller than the sum of its proper divisors (1596519560).

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

1451381380 is a wasteful number, since it uses less digits than its factorization.

1451381380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72569078 (or 72569076 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1451381380 is about 38096.9996193926. Note that the first 3 decimals coincide. The cubic root of 1451381380 is about 1132.2105109881.

The spelling of 1451381380 in words is "one billion, four hundred fifty-one million, three hundred eighty-one thousand, three hundred eighty".