149145690 has 32 divisors (see below), whose sum is σ = 361501056. Its totient is φ = 39377600.

The previous prime is 149145683. The next prime is 149145697. The reversal of 149145690 is 96541941.

It is an interprime number because it is at equal distance from previous prime (149145683) and next prime (149145697).

It is a super-2 number, since 2×149145690² = 44488873691152200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149145697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21582 + ... + 27641.

It is an arithmetic number, because the mean of its divisors is an integer number (11296908).

Almost surely, 2^149145690 is an apocalyptic number.

149145690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

149145690 is an abundant number, since it is smaller than the sum of its proper divisors (212355366).

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

149145690 is a wasteful number, since it uses less digits than its factorization.

149145690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49334.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 149145690 is about 12212.5218525905. The cubic root of 149145690 is about 530.3186525690.

The spelling of 149145690 in words is "one hundred forty-nine million, one hundred forty-five thousand, six hundred ninety".