145492581 has 8 divisors (see below), whose sum is σ = 208912480. Its totient is φ = 89533872.

The previous prime is 145492573. The next prime is 145492603. The reversal of 145492581 is 185294541.

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

It is not a de Polignac number, because 145492581 - 2³ = 145492573 is a prime.

It is a super-2 number, since 2×145492581² = 42336182252083122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3730579 = 145492581 / (1 + 4 + 5 + 4 + 9 + 2 + 5 + 8 + 1).

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145492981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865251 + ... + 1865328.

It is an arithmetic number, because the mean of its divisors is an integer number (26114060).

Almost surely, 2^145492581 is an apocalyptic number.

It is an amenable number.

145492581 is a deficient number, since it is larger than the sum of its proper divisors (63419899).

145492581 is a wasteful number, since it uses less digits than its factorization.

145492581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730595.

The product of its digits is 57600, while the sum is 39.

The square root of 145492581 is about 12062.0305504505. The cubic root of 145492581 is about 525.9530154604.

The spelling of 145492581 in words is "one hundred forty-five million, four hundred ninety-two thousand, five hundred eighty-one".