1120451261 has 4 divisors (see below), whose sum is σ = 1179422400. Its totient is φ = 1061480124.

The previous prime is 1120451209. The next prime is 1120451287. The reversal of 1120451261 is 1621540211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1621540211 = 1619 ⋅1001569.

It is a cyclic number.

It is not a de Polignac number, because 1120451261 - 2¹⁰ = 1120450237 is a prime.

It is a super-2 number, since 2×1120451261² = 2510822056552980242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120456261) 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, 29485541 + ... + 29485578.

It is an arithmetic number, because the mean of its divisors is an integer number (294855600).

Almost surely, 2^1120451261 is an apocalyptic number.

It is an amenable number.

1120451261 is a deficient number, since it is larger than the sum of its proper divisors (58971139).

1120451261 is an equidigital number, since it uses as much as digits as its factorization.

1120451261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58971138.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1120451261 is about 33473.1423831107. The cubic root of 1120451261 is about 1038.6382760520.

Adding to 1120451261 its reverse (1621540211), we get a palindrome (2741991472).

The spelling of 1120451261 in words is "one billion, one hundred twenty million, four hundred fifty-one thousand, two hundred sixty-one".