612251906 has 16 divisors (see below), whose sum is σ = 1111314816. Its totient is φ = 246958656.

The previous prime is 612251897. The next prime is 612251917. The reversal of 612251906 is 609152216.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286006 + ... + 1286481.

It is an arithmetic number, because the mean of its divisors is an integer number (69457176).

Almost surely, 2^612251906 is an apocalyptic number.

612251906 is a deficient number, since it is larger than the sum of its proper divisors (499062910).

612251906 is a wasteful number, since it uses less digits than its factorization.

612251906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572513.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 612251906 is about 24743.7245781632. The cubic root of 612251906 is about 849.1349473778.

The spelling of 612251906 in words is "six hundred twelve million, two hundred fifty-one thousand, nine hundred six".