1212649000 has 32 divisors (see below), whose sum is σ = 2837601000. Its totient is φ = 485059200.

The previous prime is 1212648961. The next prime is 1212649069. The reversal of 1212649000 is 9462121.

It can be written as a sum of positive squares in 4 ways, for example, as 247055524 + 965593476 = 15718^2 + 31074^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 605325 + ... + 607324.

Almost surely, 2^1212649000 is an apocalyptic number.

1212649000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212649000 is an abundant number, since it is smaller than the sum of its proper divisors (1624952000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212649000 is a wasteful number, since it uses less digits than its factorization.

1212649000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212670 (or 1212656 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1212649000 is about 34823.1101425476. The cubic root of 1212649000 is about 1066.3792954160.

The spelling of 1212649000 in words is "one billion, two hundred twelve million, six hundred forty-nine thousand".