145020251 has 8 divisors (see below), whose sum is σ = 154411920. Its totient is φ = 135724288.

The previous prime is 145020247. The next prime is 145020259. The reversal of 145020251 is 152020541.

145020251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145020251 - 2² = 145020247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145020259) 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, 20786 + ... + 26871.

It is an arithmetic number, because the mean of its divisors is an integer number (19301490).

Almost surely, 2^145020251 is an apocalyptic number.

145020251 is a deficient number, since it is larger than the sum of its proper divisors (9391669).

145020251 is a wasteful number, since it uses less digits than its factorization.

145020251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47853.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 145020251 is about 12042.4354264409. The cubic root of 145020251 is about 525.3832436758.

Adding to 145020251 its reverse (152020541), we get a palindrome (297040792).

The spelling of 145020251 in words is "one hundred forty-five million, twenty thousand, two hundred fifty-one".