1242645000 has 160 divisors (see below), whose sum is σ = 3988723200. Its totient is φ = 322272000.

The previous prime is 1242644999. The next prime is 1242645059. The reversal of 1242645000 is 5462421.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 553881 + ... + 556119.

It is an arithmetic number, because the mean of its divisors is an integer number (24929520).

Almost surely, 2^1242645000 is an apocalyptic number.

1242645000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242645000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1994361600).

1242645000 is an abundant number, since it is smaller than the sum of its proper divisors (2746078200).

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

1242645000 is a wasteful number, since it uses less digits than its factorization.

1242645000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305 (or 2286 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1242645000 is about 35251.1701933425. The cubic root of 1242645000 is about 1075.1004052604.

The spelling of 1242645000 in words is "one billion, two hundred forty-two million, six hundred forty-five thousand".