1520112761 has 6 divisors (see below), whose sum is σ = 1557444462. Its totient is φ = 1482793280.

The previous prime is 1520112743. The next prime is 1520112793. The reversal of 1520112761 is 1672110251.

It can be written as a sum of positive squares in 3 ways, for example, as 48930025 + 1471182736 = 6995^2 + 38356^2 .

It is not a de Polignac number, because 1520112761 - 2¹⁸ = 1519850617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520112761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520112731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 246605 + ... + 252693.

It is an arithmetic number, because the mean of its divisors is an integer number (259574077).

Almost surely, 2^1520112761 is an apocalyptic number.

It is an amenable number.

1520112761 is a deficient number, since it is larger than the sum of its proper divisors (37331701).

1520112761 is an frugal number, since it uses more digits than its factorization.

1520112761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12219 (or 6130 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 26.

The square root of 1520112761 is about 38988.6234817286. The cubic root of 1520112761 is about 1149.8078471641.

The spelling of 1520112761 in words is "one billion, five hundred twenty million, one hundred twelve thousand, seven hundred sixty-one".