61342257 has 16 divisors (see below), whose sum is σ = 83160000. Its totient is φ = 40215744.

The previous prime is 61342247. The next prime is 61342261. The reversal of 61342257 is 75224316.

It is not a de Polignac number, because 61342257 - 2⁷ = 61342129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61342207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48094 + ... + 49352.

It is an arithmetic number, because the mean of its divisors is an integer number (5197500).

Almost surely, 2^61342257 is an apocalyptic number.

It is an amenable number.

61342257 is a deficient number, since it is larger than the sum of its proper divisors (21817743).

61342257 is a wasteful number, since it uses less digits than its factorization.

61342257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its digits is 10080, while the sum is 30.

The square root of 61342257 is about 7832.1297869737. The cubic root of 61342257 is about 394.3845717289.

The spelling of 61342257 in words is "sixty-one million, three hundred forty-two thousand, two hundred fifty-seven".