1210045521 has 8 divisors (see below), whose sum is σ = 1656999424. Its totient is φ = 784894320.

The previous prime is 1210045493. The next prime is 1210045531. The reversal of 1210045521 is 1255400121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1210045521 - 2⁹ = 1210045009 is a prime.

It is a super-2 number, since 2×1210045521² = 2928420325784322882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210045531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5450545 + ... + 5450766.

It is an arithmetic number, because the mean of its divisors is an integer number (207124928).

Almost surely, 2^1210045521 is an apocalyptic number.

It is an amenable number.

1210045521 is a deficient number, since it is larger than the sum of its proper divisors (446953903).

1210045521 is a wasteful number, since it uses less digits than its factorization.

1210045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10901351.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1210045521 is about 34785.7085740682. The cubic root of 1210045521 is about 1065.6155994859.

Adding to 1210045521 its reverse (1255400121), we get a palindrome (2465445642).

The spelling of 1210045521 in words is "one billion, two hundred ten million, forty-five thousand, five hundred twenty-one".