145091251 has 8 divisors (see below), whose sum is σ = 150023664. Its totient is φ = 140225280.

The previous prime is 145091249. The next prime is 145091257. The reversal of 145091251 is 152190541.

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 145091251 - 2¹ = 145091249 is a prime.

It is a super-2 number, since 2×145091251² = 42102942233490002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145091257) 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, 12150 + ... + 20923.

It is an arithmetic number, because the mean of its divisors is an integer number (18752958).

Almost surely, 2^145091251 is an apocalyptic number.

145091251 is a deficient number, since it is larger than the sum of its proper divisors (4932413).

145091251 is a wasteful number, since it uses less digits than its factorization.

145091251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33221.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 145091251 is about 12045.3829744014. The cubic root of 145091251 is about 525.4689699201.

The spelling of 145091251 in words is "one hundred forty-five million, ninety-one thousand, two hundred fifty-one".