145451340 has 72 divisors (see below), whose sum is σ = 445169088. Its totient is φ = 38438400.

The previous prime is 145451321. The next prime is 145451351. The reversal of 145451340 is 43154541.

It is a happy number.

145451340 is a `hidden beast` number, since 145 + 4 + 513 + 4 + 0 = 666.

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 23 ways as a sum of consecutive naturals, for example, 16765 + ... + 23915.

It is an arithmetic number, because the mean of its divisors is an integer number (6182904).

Almost surely, 2^145451340 is an apocalyptic number.

145451340 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 145451340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222584544).

145451340 is an abundant number, since it is smaller than the sum of its proper divisors (299717748).

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

145451340 is a wasteful number, since it uses less digits than its factorization.

145451340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7279 (or 7274 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 145451340 is about 12060.3208912533. The cubic root of 145451340 is about 525.9033156110.

The spelling of 145451340 in words is "one hundred forty-five million, four hundred fifty-one thousand, three hundred forty".