149451557 has 2 divisors, whose sum is σ = 149451558. Its totient is φ = 149451556.

The previous prime is 149451503. The next prime is 149451563. The reversal of 149451557 is 755154941.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149059681 + 391876 = 12209^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 149451557 - 2²⁶ = 82342693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149451257) 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 as a sum of consecutive naturals, namely, 74725778 + 74725779.

It is an arithmetic number, because the mean of its divisors is an integer number (74725779).

Almost surely, 2^149451557 is an apocalyptic number.

It is an amenable number.

149451557 is a deficient number, since it is larger than the sum of its proper divisors (1).

149451557 is an equidigital number, since it uses as much as digits as its factorization.

149451557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 41.

The square root of 149451557 is about 12225.0381185500. The cubic root of 149451557 is about 530.6809296980.

The spelling of 149451557 in words is "one hundred forty-nine million, four hundred fifty-one thousand, five hundred fifty-seven".