612465521 has 4 divisors (see below), whose sum is σ = 613042752. Its totient is φ = 611888292.

The previous prime is 612465467. The next prime is 612465523. The reversal of 612465521 is 125564216.

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 not a de Polignac number, because 612465521 - 2¹⁰ = 612464497 is a prime.

It is a super-2 number, since 2×612465521² = 750228028827602882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612465523) 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, 287021 + ... + 289146.

It is an arithmetic number, because the mean of its divisors is an integer number (153260688).

Almost surely, 2^612465521 is an apocalyptic number.

It is an amenable number.

612465521 is a deficient number, since it is larger than the sum of its proper divisors (577231).

612465521 is a wasteful number, since it uses less digits than its factorization.

612465521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577230.

The product of its digits is 14400, while the sum is 32.

The square root of 612465521 is about 24748.0407507342. The cubic root of 612465521 is about 849.2336904326.

The spelling of 612465521 in words is "six hundred twelve million, four hundred sixty-five thousand, five hundred twenty-one".