1520149 has 4 divisors (see below), whose sum is σ = 1534464. Its totient is φ = 1505836.

The previous prime is 1520143. The next prime is 1520153. The reversal of 1520149 is 9410251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520149 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1520149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520143) 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, 6997 + ... + 7210.

It is an arithmetic number, because the mean of its divisors is an integer number (383616).

2^1520149 is an apocalyptic number.

It is an amenable number.

1520149 is a deficient number, since it is larger than the sum of its proper divisors (14315).

1520149 is a wasteful number, since it uses less digits than its factorization.

1520149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14314.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1520149 is about 1232.9432265924. The cubic root of 1520149 is about 114.9816984108.

It can be divided in two parts, 15 and 20149, that added together give a square (20164 = 142²).

The spelling of 1520149 in words is "one million, five hundred twenty thousand, one hundred forty-nine".