149646421 has 2 divisors, whose sum is σ = 149646422. Its totient is φ = 149646420.

The previous prime is 149646403. The next prime is 149646439. The reversal of 149646421 is 124646941.

It is a balanced prime because it is at equal distance from previous prime (149646403) and next prime (149646439).

It can be written as a sum of positive squares in only one way, i.e., 144937521 + 4708900 = 12039^2 + 2170^2 .

It is a cyclic number.

It is not a de Polignac number, because 149646421 - 2¹⁷ = 149515349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149646491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74823210 + 74823211.

It is an arithmetic number, because the mean of its divisors is an integer number (74823211).

Almost surely, 2^149646421 is an apocalyptic number.

It is an amenable number.

149646421 is a deficient number, since it is larger than the sum of its proper divisors (1).

149646421 is an equidigital number, since it uses as much as digits as its factorization.

149646421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 149646421 is about 12233.0053952412. The cubic root of 149646421 is about 530.9114741834.

The spelling of 149646421 in words is "one hundred forty-nine million, six hundred forty-six thousand, four hundred twenty-one".