149124557 has 2 divisors, whose sum is σ = 149124558. Its totient is φ = 149124556.

The previous prime is 149124551. The next prime is 149124589. The reversal of 149124557 is 755421941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80748196 + 68376361 = 8986^2 + 8269^2 .

It is an emirp because it is prime and its reverse (755421941) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149124557 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149124557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149124551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74562278 + 74562279.

It is an arithmetic number, because the mean of its divisors is an integer number (74562279).

Almost surely, 2^149124557 is an apocalyptic number.

It is an amenable number.

149124557 is a deficient number, since it is larger than the sum of its proper divisors (1).

149124557 is an equidigital number, since it uses as much as digits as its factorization.

149124557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 38.

The square root of 149124557 is about 12211.6566034261. The cubic root of 149124557 is about 530.2936037874.

The spelling of 149124557 in words is "one hundred forty-nine million, one hundred twenty-four thousand, five hundred fifty-seven".