149451061 has 2 divisors, whose sum is σ = 149451062. Its totient is φ = 149451060.

The previous prime is 149451059. The next prime is 149451083. The reversal of 149451061 is 160154941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146264836 + 3186225 = 12094^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 149451061 - 2¹ = 149451059 is a prime.

Together with 149451059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149451041) 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, 74725530 + 74725531.

It is an arithmetic number, because the mean of its divisors is an integer number (74725531).

Almost surely, 2^149451061 is an apocalyptic number.

It is an amenable number.

149451061 is a deficient number, since it is larger than the sum of its proper divisors (1).

149451061 is an equidigital number, since it uses as much as digits as its factorization.

149451061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 149451061 is about 12225.0178322978. The cubic root of 149451061 is about 530.6803426225.

The spelling of 149451061 in words is "one hundred forty-nine million, four hundred fifty-one thousand, sixty-one".