149261019 has 4 divisors (see below), whose sum is σ = 199014696. Its totient is φ = 99507344.

The previous prime is 149260987. The next prime is 149261023. The reversal of 149261019 is 910162941.

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 149261019 - 2⁵ = 149260987 is a prime.

It is a super-2 number, since 2×149261019² = 44557703585836722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149261039) 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, 24876834 + ... + 24876839.

It is an arithmetic number, because the mean of its divisors is an integer number (49753674).

Almost surely, 2^149261019 is an apocalyptic number.

149261019 is a deficient number, since it is larger than the sum of its proper divisors (49753677).

149261019 is an equidigital number, since it uses as much as digits as its factorization.

149261019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49753676.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 149261019 is about 12217.2426921953. The cubic root of 149261019 is about 530.4553094671.

The spelling of 149261019 in words is "one hundred forty-nine million, two hundred sixty-one thousand, nineteen".