1520145461 has 8 divisors (see below), whose sum is σ = 1576791480. Its totient is φ = 1463781312.

The previous prime is 1520145449. The next prime is 1520145467. The reversal of 1520145461 is 1645410251.

It can be written as a sum of positive squares in 4 ways, for example, as 15171025 + 1504974436 = 3895^2 + 38794^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1520145461 - 2³⁰ = 446403637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520145467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59450 + ... + 81083.

It is an arithmetic number, because the mean of its divisors is an integer number (197098935).

Almost surely, 2^1520145461 is an apocalyptic number.

It is an amenable number.

1520145461 is a deficient number, since it is larger than the sum of its proper divisors (56646019).

1520145461 is a wasteful number, since it uses less digits than its factorization.

1520145461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140935.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1520145461 is about 38989.0428325703. The cubic root of 1520145461 is about 1149.8160918260.

The spelling of 1520145461 in words is "one billion, five hundred twenty million, one hundred forty-five thousand, four hundred sixty-one".