145197450 has 72 divisors (see below), whose sum is σ = 392078700. Its totient is φ = 38522880.

The previous prime is 145197443. The next prime is 145197463. The reversal of 145197450 is 54791541.

145197450 is a `hidden beast` number, since 14 + 5 + 197 + 450 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 41951529 + 103245921 = 6477^2 + 10161^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 102346 + ... + 103754.

Almost surely, 2^145197450 is an apocalyptic number.

145197450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145197450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196039350).

145197450 is an abundant number, since it is smaller than the sum of its proper divisors (246881250).

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

145197450 is a wasteful number, since it uses less digits than its factorization.

145197450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 145197450 is about 12049.7904546096. The cubic root of 145197450 is about 525.5971436707.

The spelling of 145197450 in words is "one hundred forty-five million, one hundred ninety-seven thousand, four hundred fifty".