149381247 has 8 divisors (see below), whose sum is σ = 204558256. Its totient is φ = 96895872.

The previous prime is 149381237. The next prime is 149381279. The reversal of 149381247 is 742183941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 149381247 - 2⁷ = 149381119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149381207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672778 + ... + 672999.

It is an arithmetic number, because the mean of its divisors is an integer number (25569782).

Almost surely, 2^149381247 is an apocalyptic number.

149381247 is a deficient number, since it is larger than the sum of its proper divisors (55177009).

149381247 is a wasteful number, since it uses less digits than its factorization.

149381247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345817.

The product of its digits is 48384, while the sum is 39.

The square root of 149381247 is about 12222.1621245997. The cubic root of 149381247 is about 530.5976964202.

The spelling of 149381247 in words is "one hundred forty-nine million, three hundred eighty-one thousand, two hundred forty-seven".