145539251 has 24 divisors (see below), whose sum is σ = 174274560. Its totient is φ = 120463200.

The previous prime is 145539187. The next prime is 145539271. The reversal of 145539251 is 152935541.

It is not a de Polignac number, because 145539251 - 2⁶ = 145539187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145539271) 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, 146366 + ... + 147356.

It is an arithmetic number, because the mean of its divisors is an integer number (7261440).

Almost surely, 2^145539251 is an apocalyptic number.

145539251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145539251 is a deficient number, since it is larger than the sum of its proper divisors (28735309).

145539251 is a wasteful number, since it uses less digits than its factorization.

145539251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1094 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 145539251 is about 12063.9649783974. The cubic root of 145539251 is about 526.0092465135.

The spelling of 145539251 in words is "one hundred forty-five million, five hundred thirty-nine thousand, two hundred fifty-one".