145544457 has 8 divisors (see below), whose sum is σ = 194170176. Its totient is φ = 96974192.

The previous prime is 145544449. The next prime is 145544461. The reversal of 145544457 is 754445541.

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

It is a cyclic number.

It is not a de Polignac number, because 145544457 - 2³ = 145544449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145544447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7293 + ... + 18554.

It is an arithmetic number, because the mean of its divisors is an integer number (24271272).

Almost surely, 2^145544457 is an apocalyptic number.

It is an amenable number.

145544457 is a deficient number, since it is larger than the sum of its proper divisors (48625719).

145544457 is a wasteful number, since it uses less digits than its factorization.

145544457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27727.

The product of its digits is 224000, while the sum is 39.

The square root of 145544457 is about 12064.1807430094. The cubic root of 145544457 is about 526.0155182958.

Adding to 145544457 its reverse (754445541), we get a palindrome (899989998).

The spelling of 145544457 in words is "one hundred forty-five million, five hundred forty-four thousand, four hundred fifty-seven".