1213754220 has 120 divisors (see below), whose sum is σ = 4351574304. Its totient is φ = 277426944.

The previous prime is 1213754189. The next prime is 1213754231. The reversal of 1213754220 is 224573121.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 42177 + ... + 64856.

Almost surely, 2^1213754220 is an apocalyptic number.

1213754220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213754220 is an abundant number, since it is smaller than the sum of its proper divisors (3137820084).

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

1213754220 is a wasteful number, since it uses less digits than its factorization.

1213754220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107061 (or 107050 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1213754220 is about 34838.9755876949. The cubic root of 1213754220 is about 1066.7031665027.

The spelling of 1213754220 in words is "one billion, two hundred thirteen million, seven hundred fifty-four thousand, two hundred twenty".