149451157 has 4 divisors (see below), whose sum is σ = 150277036. Its totient is φ = 148625280.

The previous prime is 149451151. The next prime is 149451161. The reversal of 149451157 is 751154941.

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 586756 + 148864401 = 766^2 + 12201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149451157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149451151) 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 3 ways as a sum of consecutive naturals, for example, 412668 + ... + 413029.

It is an arithmetic number, because the mean of its divisors is an integer number (37569259).

Almost surely, 2^149451157 is an apocalyptic number.

It is an amenable number.

149451157 is a deficient number, since it is larger than the sum of its proper divisors (825879).

149451157 is an equidigital number, since it uses as much as digits as its factorization.

149451157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825878.

The product of its digits is 25200, while the sum is 37.

The square root of 149451157 is about 12225.0217586718. The cubic root of 149451157 is about 530.6804562502.

The spelling of 149451157 in words is "one hundred forty-nine million, four hundred fifty-one thousand, one hundred fifty-seven".