1222752261 has 8 divisors (see below), whose sum is σ = 1630951200. Its totient is φ = 814860752.

The previous prime is 1222752253. The next prime is 1222752269. The reversal of 1222752261 is 1622572221.

It is an interprime number because it is at equal distance from previous prime (1222752253) and next prime (1222752269).

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

It is a cyclic number.

It is not a de Polignac number, because 1222752261 - 2³ = 1222752253 is a prime.

It is a super-2 number, since 2×1222752261² = 2990246183561224242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222752269) 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, 67410 + ... + 83603.

It is an arithmetic number, because the mean of its divisors is an integer number (203868900).

Almost surely, 2^1222752261 is an apocalyptic number.

It is an amenable number.

1222752261 is a deficient number, since it is larger than the sum of its proper divisors (408198939).

1222752261 is a wasteful number, since it uses less digits than its factorization.

1222752261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153715.

The product of its digits is 6720, while the sum is 30.

The square root of 1222752261 is about 34967.8746995010. The cubic root of 1222752261 is about 1069.3326438052.

The spelling of 1222752261 in words is "one billion, two hundred twenty-two million, seven hundred fifty-two thousand, two hundred sixty-one".