61029261 has 8 divisors (see below), whose sum is σ = 90413760. Its totient is φ = 40686156.

The previous prime is 61029259. The next prime is 61029271. The reversal of 61029261 is 16292016.

61029261 is a `hidden beast` number, since 610 + 29 + 26 + 1 = 666.

It is not a de Polignac number, because 61029261 - 2¹ = 61029259 is a prime.

It is a super-2 number, since 2×61029261² = 7449141396412242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2260343 = 61029261 / (6 + 1 + 0 + 2 + 9 + 2 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61029271) 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, 1130145 + ... + 1130198.

It is an arithmetic number, because the mean of its divisors is an integer number (11301720).

Almost surely, 2^61029261 is an apocalyptic number.

It is an amenable number.

61029261 is a deficient number, since it is larger than the sum of its proper divisors (29384499).

61029261 is a wasteful number, since it uses less digits than its factorization.

61029261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260352 (or 2260346 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 61029261 is about 7812.1226948890. The cubic root of 61029261 is about 393.7126513327.

The spelling of 61029261 in words is "sixty-one million, twenty-nine thousand, two hundred sixty-one".