612240857 has 8 divisors (see below), whose sum is σ = 644700000. Its totient is φ = 579805344.

The previous prime is 612240829. The next prime is 612240859. The reversal of 612240857 is 758042216.

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 612240857 - 2¹⁰ = 612239833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612240859) 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, 77894 + ... + 85392.

It is an arithmetic number, because the mean of its divisors is an integer number (80587500).

Almost surely, 2^612240857 is an apocalyptic number.

It is an amenable number.

612240857 is a deficient number, since it is larger than the sum of its proper divisors (32459143).

612240857 is a wasteful number, since it uses less digits than its factorization.

612240857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11815.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 612240857 is about 24743.5013084244. The cubic root of 612240857 is about 849.1298393777.

The spelling of 612240857 in words is "six hundred twelve million, two hundred forty thousand, eight hundred fifty-seven".