149197420 has 24 divisors (see below), whose sum is σ = 323422848. Its totient is φ = 57753600.

The previous prime is 149197417. The next prime is 149197427. The reversal of 149197420 is 24791941.

It is a self number, because there is not a number n which added to its sum of digits gives 149197420.

It is not an unprimeable number, because it can be changed into a prime (149197427) 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, 119701 + ... + 120940.

It is an arithmetic number, because the mean of its divisors is an integer number (13475952).

Almost surely, 2^149197420 is an apocalyptic number.

149197420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

149197420 is an abundant number, since it is smaller than the sum of its proper divisors (174225428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149197420 is a wasteful number, since it uses less digits than its factorization.

149197420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240681 (or 240679 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 149197420 is about 12214.6395771631. The cubic root of 149197420 is about 530.3799577551.

The spelling of 149197420 in words is "one hundred forty-nine million, one hundred ninety-seven thousand, four hundred twenty".