145906157 has 4 divisors (see below), whose sum is σ = 146056476. Its totient is φ = 145755840.

The previous prime is 145906153. The next prime is 145906169. The reversal of 145906157 is 751609541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107205316 + 38700841 = 10354^2 + 6221^2 .

It is a cyclic number.

It is not a de Polignac number, because 145906157 - 2² = 145906153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145906157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145906153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73694 + ... + 75647.

It is an arithmetic number, because the mean of its divisors is an integer number (36514119).

Almost surely, 2^145906157 is an apocalyptic number.

It is an amenable number.

145906157 is a deficient number, since it is larger than the sum of its proper divisors (150319).

145906157 is an equidigital number, since it uses as much as digits as its factorization.

145906157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150318.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 145906157 is about 12079.1620984239. The cubic root of 145906157 is about 526.4509005516.

The spelling of 145906157 in words is "one hundred forty-five million, nine hundred six thousand, one hundred fifty-seven".