61081274 has 4 divisors (see below), whose sum is σ = 91621914. Its totient is φ = 30540636.

The previous prime is 61081243. The next prime is 61081291. The reversal of 61081274 is 47218016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40768225 + 20313049 = 6385^2 + 4507^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15270317 + ... + 15270320.

Almost surely, 2^61081274 is an apocalyptic number.

61081274 is a deficient number, since it is larger than the sum of its proper divisors (30540640).

61081274 is a wasteful number, since it uses less digits than its factorization.

61081274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30540639.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 61081274 is about 7815.4509786704. The cubic root of 61081274 is about 393.8244685220.

The spelling of 61081274 in words is "sixty-one million, eighty-one thousand, two hundred seventy-four".