145531400 has 48 divisors (see below), whose sum is σ = 386701440. Its totient is φ = 49896000.

The previous prime is 145531387. The next prime is 145531409. The reversal of 145531400 is 4135541.

It is not an unprimeable number, because it can be changed into a prime (145531409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50576 + ... + 53375.

It is an arithmetic number, because the mean of its divisors is an integer number (8056280).

Almost surely, 2^145531400 is an apocalyptic number.

145531400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145531400 is an abundant number, since it is smaller than the sum of its proper divisors (241170040).

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

145531400 is a wasteful number, since it uses less digits than its factorization.

145531400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103974 (or 103965 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145531400 is about 12063.6395834756. The cubic root of 145531400 is about 525.9997879589. Note that the first 3 decimals are identical.

Adding to 145531400 its reverse (4135541), we get a palindrome (149666941).

The spelling of 145531400 in words is "one hundred forty-five million, five hundred thirty-one thousand, four hundred".