145401225 has 24 divisors (see below), whose sum is σ = 241323840. Its totient is φ = 77248320.

The previous prime is 145401209. The next prime is 145401229. The reversal of 145401225 is 522104541.

It is not a de Polignac number, because 145401225 - 2⁴ = 145401209 is a prime.

It is a super-2 number, since 2×145401225² = 42283032463001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145401195 and 145401204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145401229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16572 + ... + 23778.

It is an arithmetic number, because the mean of its divisors is an integer number (10055160).

Almost surely, 2^145401225 is an apocalyptic number.

145401225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145401225 is a deficient number, since it is larger than the sum of its proper divisors (95922615).

145401225 is a wasteful number, since it uses less digits than its factorization.

145401225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7489 (or 7484 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 145401225 is about 12058.2430312214. The cubic root of 145401225 is about 525.8429089894.

Adding to 145401225 its reverse (522104541), we get a palindrome (667505766).

The spelling of 145401225 in words is "one hundred forty-five million, four hundred one thousand, two hundred twenty-five".