1205045400 has 96 divisors (see below), whose sum is σ = 4023023760. Its totient is φ = 296624640.

The previous prime is 1205045353. The next prime is 1205045407. The reversal of 1205045400 is 45405021.

It is a super-2 number, since 2×1205045400² = 2904268832122320000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205045407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69447 + ... + 85046.

Almost surely, 2^1205045400 is an apocalyptic number.

1205045400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205045400 is an abundant number, since it is smaller than the sum of its proper divisors (2817978360).

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

1205045400 is a wasteful number, since it uses less digits than its factorization.

1205045400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154525 (or 154516 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1205045400 is about 34713.7638408744. The cubic root of 1205045400 is about 1064.1458027529.

The spelling of 1205045400 in words is "one billion, two hundred five million, forty-five thousand, four hundred".