1520604461 has 4 divisors (see below), whose sum is σ = 1520728992. Its totient is φ = 1520479932.

The previous prime is 1520604443. The next prime is 1520604479. The reversal of 1520604461 is 1644060251.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1644060251 = 11093 ⋅148207.

It is an interprime number because it is at equal distance from previous prime (1520604443) and next prime (1520604479).

It is a cyclic number.

It is not a de Polignac number, because 1520604461 - 2¹⁴ = 1520588077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520600461) 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, 41681 + ... + 69126.

It is an arithmetic number, because the mean of its divisors is an integer number (380182248).

Almost surely, 2^1520604461 is an apocalyptic number.

It is an amenable number.

1520604461 is a deficient number, since it is larger than the sum of its proper divisors (124531).

1520604461 is a wasteful number, since it uses less digits than its factorization.

1520604461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124530.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1520604461 is about 38994.9286574549. The cubic root of 1520604461 is about 1149.9318071725.

The spelling of 1520604461 in words is "one billion, five hundred twenty million, six hundred four thousand, four hundred sixty-one".