1211449520 has 40 divisors (see below), whose sum is σ = 2826287856. Its totient is φ = 482916608.

The previous prime is 1211449517. The next prime is 1211449531. The reversal of 1211449520 is 259441121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×1211449520³ (a number of 28 digits) contains 333 as substring.

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, 2402 + ... + 49281.

Almost surely, 2^1211449520 is an apocalyptic number.

1211449520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211449520 is an abundant number, since it is smaller than the sum of its proper divisors (1614838336).

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

1211449520 is a wasteful number, since it uses less digits than its factorization.

1211449520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51989 (or 51983 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1211449520 is about 34805.8834107109. The cubic root of 1211449520 is about 1066.0275798451.

The spelling of 1211449520 in words is "one billion, two hundred eleven million, four hundred forty-nine thousand, five hundred twenty".