144691157 has 4 divisors (see below), whose sum is σ = 155821260. Its totient is φ = 133561056.

The previous prime is 144691153. The next prime is 144691159. The reversal of 144691157 is 751196441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751196441 = 47 ⋅15982903.

It can be written as a sum of positive squares in 2 ways, for example, as 9991921 + 134699236 = 3161^2 + 11606^2 .

It is a cyclic number.

It is not a de Polignac number, because 144691157 - 2² = 144691153 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 144691157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144691153) 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, 5565032 + ... + 5565057.

It is an arithmetic number, because the mean of its divisors is an integer number (38955315).

Almost surely, 2^144691157 is an apocalyptic number.

It is an amenable number.

144691157 is a deficient number, since it is larger than the sum of its proper divisors (11130103).

144691157 is a wasteful number, since it uses less digits than its factorization.

144691157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11130102.

The product of its digits is 30240, while the sum is 38.

The square root of 144691157 is about 12028.7637353138. The cubic root of 144691157 is about 524.9855258292.

The spelling of 144691157 in words is "one hundred forty-four million, six hundred ninety-one thousand, one hundred fifty-seven".