145240251 has 8 divisors (see below), whose sum is σ = 208550160. Its totient is φ = 89378592.

The previous prime is 145240243. The next prime is 145240267. The reversal of 145240251 is 152042541.

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

It is not a de Polignac number, because 145240251 - 2³ = 145240243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145240201) 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, 1862016 + ... + 1862093.

It is an arithmetic number, because the mean of its divisors is an integer number (26068770).

Almost surely, 2^145240251 is an apocalyptic number.

145240251 is a deficient number, since it is larger than the sum of its proper divisors (63309909).

145240251 is a wasteful number, since it uses less digits than its factorization.

145240251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3724125.

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

The square root of 145240251 is about 12051.5663297349. The cubic root of 145240251 is about 525.6487834051.

Adding to 145240251 its reverse (152042541), we get a palindrome (297282792).

The spelling of 145240251 in words is "one hundred forty-five million, two hundred forty thousand, two hundred fifty-one".