61121269 has 4 divisors (see below), whose sum is σ = 66677760. Its totient is φ = 55564780.

The previous prime is 61121209. The next prime is 61121279. The reversal of 61121269 is 96212116.

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 61121269 - 2¹³ = 61113077 is a prime.

It is a super-2 number, since 2×61121269² = 7471619048340722, 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 (61121209) 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, 2778229 + ... + 2778250.

It is an arithmetic number, because the mean of its divisors is an integer number (16669440).

Almost surely, 2^61121269 is an apocalyptic number.

It is an amenable number.

61121269 is a deficient number, since it is larger than the sum of its proper divisors (5556491).

61121269 is a wasteful number, since it uses less digits than its factorization.

61121269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556490.

The product of its digits is 1296, while the sum is 28.

The square root of 61121269 is about 7818.0092734660. The cubic root of 61121269 is about 393.9104063335.

It can be divided in two parts, 6112 and 1269, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 61121269 in words is "sixty-one million, one hundred twenty-one thousand, two hundred sixty-nine".