1520870649 has 8 divisors (see below), whose sum is σ = 2028380640. Its totient is φ = 1013637216.

The previous prime is 1520870647. The next prime is 1520870683. The reversal of 1520870649 is 9460780251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1520870649 - 2¹ = 1520870647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1520870649.

It is not an unprimeable number, because it can be changed into a prime (1520870647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55947 + ... + 78560.

It is an arithmetic number, because the mean of its divisors is an integer number (253547580).

Almost surely, 2^1520870649 is an apocalyptic number.

It is an amenable number.

1520870649 is a deficient number, since it is larger than the sum of its proper divisors (507509991).

1520870649 is a wasteful number, since it uses less digits than its factorization.

1520870649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138279.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1520870649 is about 38998.3416185868. The cubic root of 1520870649 is about 1149.9989033386.

The spelling of 1520870649 in words is "one billion, five hundred twenty million, eight hundred seventy thousand, six hundred forty-nine".