61870 has 16 divisors (see below), whose sum is σ = 116640. Its totient is φ = 23584.

The previous prime is 61861. The next prime is 61871. The reversal of 61870 is 7816.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61871) 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, 96 + ... + 364.

It is an arithmetic number, because the mean of its divisors is an integer number (7290).

2⁶¹⁸⁷⁰ is an apocalyptic number.

61870 is a deficient number, since it is larger than the sum of its proper divisors (54770).

61870 is a wasteful number, since it uses less digits than its factorization.

61870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 61870 is about 248.7368086955. The cubic root of 61870 is about 39.5512340568.

The spelling of 61870 in words is "sixty-one thousand, eight hundred seventy".