1212675478 has 16 divisors (see below), whose sum is σ = 2109901824. Its totient is φ = 511960680.

The previous prime is 1212675449. The next prime is 1212675487. The reversal of 1212675478 is 8745762121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645478 + ... + 647353.

It is an arithmetic number, because the mean of its divisors is an integer number (131868864).

Almost surely, 2^1212675478 is an apocalyptic number.

1212675478 is a deficient number, since it is larger than the sum of its proper divisors (897226346).

1212675478 is a wasteful number, since it uses less digits than its factorization.

1212675478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292907.

The product of its digits is 188160, while the sum is 43.

The square root of 1212675478 is about 34823.4903190361. The cubic root of 1212675478 is about 1066.3870567675.

The spelling of 1212675478 in words is "one billion, two hundred twelve million, six hundred seventy-five thousand, four hundred seventy-eight".