612820426 has 4 divisors (see below), whose sum is σ = 919230642. Its totient is φ = 306410212.

The previous prime is 612820409. The next prime is 612820427. The reversal of 612820426 is 624028216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 519794401 + 93026025 = 22799^2 + 9645^2 .

It is not an unprimeable number, because it can be changed into a prime (612820427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153205105 + ... + 153205108.

Almost surely, 2^612820426 is an apocalyptic number.

612820426 is a deficient number, since it is larger than the sum of its proper divisors (306410216).

612820426 is a wasteful number, since it uses less digits than its factorization.

612820426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306410215.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 612820426 is about 24755.2100778806. The cubic root of 612820426 is about 849.3976937244.

The spelling of 612820426 in words is "six hundred twelve million, eight hundred twenty thousand, four hundred twenty-six".