145408546 has 4 divisors (see below), whose sum is σ = 218112822. Its totient is φ = 72704272.

The previous prime is 145408541. The next prime is 145408547. The reversal of 145408546 is 645804541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645804541 = 103 ⋅6269947.

It can be written as a sum of positive squares in only one way, i.e., 141348321 + 4060225 = 11889^2 + 2015^2 .

It is a super-2 number, since 2×145408546² = 42287290499668232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145408541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36352135 + ... + 36352138.

Almost surely, 2^145408546 is an apocalyptic number.

145408546 is a deficient number, since it is larger than the sum of its proper divisors (72704276).

145408546 is an equidigital number, since it uses as much as digits as its factorization.

145408546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72704275.

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 145408546 is about 12058.5465956723. The cubic root of 145408546 is about 525.8517342963.

The spelling of 145408546 in words is "one hundred forty-five million, four hundred eight thousand, five hundred forty-six".