145404025 has 24 divisors (see below), whose sum is σ = 197487360. Its totient is φ = 105541440.

The previous prime is 145404023. The next prime is 145404031. The reversal of 145404025 is 520404541.

It is a happy number.

It is not a de Polignac number, because 145404025 - 2¹ = 145404023 is a prime.

It is a super-3 number, since 3×145404025³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (145404023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15384 + ... + 22966.

It is an arithmetic number, because the mean of its divisors is an integer number (8228640).

Almost surely, 2^145404025 is an apocalyptic number.

It is an amenable number.

145404025 is a deficient number, since it is larger than the sum of its proper divisors (52083335).

145404025 is a wasteful number, since it uses less digits than its factorization.

145404025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7665 (or 7660 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 145404025 is about 12058.3591338125. The cubic root of 145404025 is about 525.8462843637.

Adding to 145404025 its reverse (520404541), we get a palindrome (665808566).

The spelling of 145404025 in words is "one hundred forty-five million, four hundred four thousand, twenty-five".