61143290 has 16 divisors (see below), whose sum is σ = 118524168. Its totient is φ = 22575936.

The previous prime is 61143241. The next prime is 61143307. The reversal of 61143290 is 9234116.

It can be written as a sum of positive squares in 4 ways, for example, as 53684929 + 7458361 = 7327^2 + 2731^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235037 + ... + 235296.

Almost surely, 2^61143290 is an apocalyptic number.

61143290 is a deficient number, since it is larger than the sum of its proper divisors (57380878).

61143290 is a wasteful number, since it uses less digits than its factorization.

61143290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470353.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 61143290 is about 7819.4174974866. The cubic root of 61143290 is about 393.9577071595.

The spelling of 61143290 in words is "sixty-one million, one hundred forty-three thousand, two hundred ninety".