149002261 has 4 divisors (see below), whose sum is σ = 154140300. Its totient is φ = 143864224.

The previous prime is 149002247. The next prime is 149002289. The reversal of 149002261 is 162200941.

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 110376036 + 38626225 = 10506^2 + 6215^2 .

It is a cyclic number.

It is not a de Polignac number, because 149002261 - 2¹¹ = 149000213 is a prime.

It is a super-2 number, since 2×149002261² = 44403347566224242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149002201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568976 + ... + 2569033.

It is an arithmetic number, because the mean of its divisors is an integer number (38535075).

Almost surely, 2^149002261 is an apocalyptic number.

It is an amenable number.

149002261 is a deficient number, since it is larger than the sum of its proper divisors (5138039).

149002261 is an equidigital number, since it uses as much as digits as its factorization.

149002261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138038.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 149002261 is about 12206.6482295510. The cubic root of 149002261 is about 530.1486007904.

It can be divided in two parts, 14900 and 2261, that added together give a square (17161 = 131²).

The spelling of 149002261 in words is "one hundred forty-nine million, two thousand, two hundred sixty-one".