61290146 has 4 divisors (see below), whose sum is σ = 91935222. Its totient is φ = 30645072.

The previous prime is 61290127. The next prime is 61290157. The reversal of 61290146 is 64109216.

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., 34093921 + 27196225 = 5839^2 + 5215^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15322535 + ... + 15322538.

Almost surely, 2^61290146 is an apocalyptic number.

61290146 is a deficient number, since it is larger than the sum of its proper divisors (30645076).

61290146 is a wasteful number, since it uses less digits than its factorization.

61290146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30645075.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 61290146 is about 7828.8023349680. The cubic root of 61290146 is about 394.2728619124.

The spelling of 61290146 in words is "sixty-one million, two hundred ninety thousand, one hundred forty-six".