149421247 has 4 divisors (see below), whose sum is σ = 150496360. Its totient is φ = 148346136.

The previous prime is 149421229. The next prime is 149421277. The reversal of 149421247 is 742124941.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149421247 - 2⁷ = 149421119 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 (149421227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537348 + ... + 537625.

It is an arithmetic number, because the mean of its divisors is an integer number (37624090).

Almost surely, 2^149421247 is an apocalyptic number.

149421247 is a deficient number, since it is larger than the sum of its proper divisors (1075113).

149421247 is a wasteful number, since it uses less digits than its factorization.

149421247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075112.

The product of its digits is 16128, while the sum is 34.

The square root of 149421247 is about 12223.7983867536. The cubic root of 149421247 is about 530.6450517926.

The spelling of 149421247 in words is "one hundred forty-nine million, four hundred twenty-one thousand, two hundred forty-seven".