145420245 has 32 divisors (see below), whose sum is σ = 259872000. Its totient is φ = 77153472.

The previous prime is 145420229. The next prime is 145420313. The reversal of 145420245 is 542024541.

145420245 is a `hidden beast` number, since 1 + 454 + 202 + 4 + 5 = 666.

It is not a de Polignac number, because 145420245 - 2⁴ = 145420229 is a prime.

It is a super-2 number, since 2×145420245² = 42294095311720050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24159 + ... + 29571.

It is an arithmetic number, because the mean of its divisors is an integer number (8121000).

Almost surely, 2^145420245 is an apocalyptic number.

145420245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145420245 is a deficient number, since it is larger than the sum of its proper divisors (114451755).

145420245 is a wasteful number, since it uses less digits than its factorization.

145420245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626 (or 5620 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 145420245 is about 12059.0316775436. The cubic root of 145420245 is about 525.8658365726.

Adding to 145420245 its reverse (542024541), we get a palindrome (687444786).

The spelling of 145420245 in words is "one hundred forty-five million, four hundred twenty thousand, two hundred forty-five".