145371554 has 8 divisors (see below), whose sum is σ = 219318300. Its totient is φ = 72265456.

The previous prime is 145371509. The next prime is 145371581. The reversal of 145371554 is 455173541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 144552529 + 819025 = 12023^2 + 905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×145371554² = 42265777424749832, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 209729 + ... + 210420.

Almost surely, 2^145371554 is an apocalyptic number.

145371554 is a deficient number, since it is larger than the sum of its proper divisors (73946746).

145371554 is a wasteful number, since it uses less digits than its factorization.

145371554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420324.

The product of its digits is 42000, while the sum is 35.

The square root of 145371554 is about 12057.0126482475. The cubic root of 145371554 is about 525.8071382079.

The spelling of 145371554 in words is "one hundred forty-five million, three hundred seventy-one thousand, five hundred fifty-four".