1229261 has 4 divisors (see below), whose sum is σ = 1341024. Its totient is φ = 1117500.

The previous prime is 1229257. The next prime is 1229269. The reversal of 1229261 is 1629221.

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.

It is a cyclic number.

It is not a de Polignac number, because 1229261 - 2² = 1229257 is a prime.

It is a super-2 number, since 2×1229261² = 3022165212242, 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 (1229269) 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, 55865 + ... + 55886.

It is an arithmetic number, because the mean of its divisors is an integer number (335256).

2^1229261 is an apocalyptic number.

1229261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1229261 is a deficient number, since it is larger than the sum of its proper divisors (111763).

1229261 is a wasteful number, since it uses less digits than its factorization.

1229261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111762.

The product of its digits is 432, while the sum is 23.

The square root of 1229261 is about 1108.7204336531. The cubic root of 1229261 is about 107.1226648085.

The spelling of 1229261 in words is "one million, two hundred twenty-nine thousand, two hundred sixty-one".