1241021451 has 4 divisors (see below), whose sum is σ = 1654695272. Its totient is φ = 827347632.

The previous prime is 1241021449. The next prime is 1241021473. The reversal of 1241021451 is 1541201421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1541201421 = 3 ⋅513733807.

It is not a de Polignac number, because 1241021451 - 2¹ = 1241021449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241021401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206836906 + ... + 206836911.

It is an arithmetic number, because the mean of its divisors is an integer number (413673818).

Almost surely, 2^1241021451 is an apocalyptic number.

1241021451 is a deficient number, since it is larger than the sum of its proper divisors (413673821).

1241021451 is an equidigital number, since it uses as much as digits as its factorization.

1241021451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413673820.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1241021451 is about 35228.1343672923. The cubic root of 1241021451 is about 1074.6319853680.

Adding to 1241021451 its reverse (1541201421), we get a palindrome (2782222872).

The spelling of 1241021451 in words is "one billion, two hundred forty-one million, twenty-one thousand, four hundred fifty-one".