145878001 has 2 divisors, whose sum is σ = 145878002. Its totient is φ = 145878000.

The previous prime is 145877999. The next prime is 145878043. The reversal of 145878001 is 100878541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132365025 + 13512976 = 11505^2 + 3676^2 .

It is a cyclic number.

It is not a de Polignac number, because 145878001 - 2¹ = 145877999 is a prime.

Together with 145877999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145876001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72939000 + 72939001.

It is an arithmetic number, because the mean of its divisors is an integer number (72939001).

Almost surely, 2^145878001 is an apocalyptic number.

It is an amenable number.

145878001 is a deficient number, since it is larger than the sum of its proper divisors (1).

145878001 is an equidigital number, since it uses as much as digits as its factorization.

145878001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 145878001 is about 12077.9965640002. The cubic root of 145878001 is about 526.4170347084.

The spelling of 145878001 in words is "one hundred forty-five million, eight hundred seventy-eight thousand, one".