61115402 has 4 divisors (see below), whose sum is σ = 91673106. Its totient is φ = 30557700.

The previous prime is 61115389. The next prime is 61115423. The reversal of 61115402 is 20451116.

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., 32160241 + 28955161 = 5671^2 + 5381^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15278849 + ... + 15278852.

Almost surely, 2^61115402 is an apocalyptic number.

61115402 is a deficient number, since it is larger than the sum of its proper divisors (30557704).

61115402 is a wasteful number, since it uses less digits than its factorization.

61115402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30557703.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61115402 is about 7817.6340410638. The cubic root of 61115402 is about 393.8978021760.

Adding to 61115402 its reverse (20451116), we get a palindrome (81566518).

The spelling of 61115402 in words is "sixty-one million, one hundred fifteen thousand, four hundred two".