145212501 has 16 divisors (see below), whose sum is σ = 230897664. Its totient is φ = 79370544.

The previous prime is 145212481. The next prime is 145212503. The reversal of 145212501 is 105212541.

It is not a de Polignac number, because 145212501 - 2⁷ = 145212373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145212503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149841 + ... + 150806.

It is an arithmetic number, because the mean of its divisors is an integer number (14431104).

Almost surely, 2^145212501 is an apocalyptic number.

It is an amenable number.

145212501 is a deficient number, since it is larger than the sum of its proper divisors (85685163).

145212501 is a wasteful number, since it uses less digits than its factorization.

145212501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300680.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 145212501 is about 12050.4149721078. The cubic root of 145212501 is about 525.6153039742.

The spelling of 145212501 in words is "one hundred forty-five million, two hundred twelve thousand, five hundred one".