145931001 has 24 divisors (see below), whose sum is σ = 207166464. Its totient is φ = 91355040.

The previous prime is 145930999. The next prime is 145931017. The reversal of 145931001 is 100139541.

It is not a de Polignac number, because 145931001 - 2¹ = 145930999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145931501) 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, 137011 + ... + 138071.

It is an arithmetic number, because the mean of its divisors is an integer number (8631936).

Almost surely, 2^145931001 is an apocalyptic number.

It is an amenable number.

145931001 is a deficient number, since it is larger than the sum of its proper divisors (61235463).

145931001 is a wasteful number, since it uses less digits than its factorization.

145931001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1210 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 145931001 is about 12080.1904372406. The cubic root of 145931001 is about 526.4807791260.

The spelling of 145931001 in words is "one hundred forty-five million, nine hundred thirty-one thousand, one".