61439146 has 4 divisors (see below), whose sum is σ = 92158722. Its totient is φ = 30719572.

The previous prime is 61439143. The next prime is 61439149. The reversal of 61439146 is 64193416.

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

It is an interprime number because it is at equal distance from previous prime (61439143) and next prime (61439149).

It can be written as a sum of positive squares in only one way, i.e., 49154121 + 12285025 = 7011^2 + 3505^2 .

It is a super-2 number, since 2×61439146² = 7549537322418632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61439143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15359785 + ... + 15359788.

Almost surely, 2^61439146 is an apocalyptic number.

61439146 is a deficient number, since it is larger than the sum of its proper divisors (30719576).

61439146 is a wasteful number, since it uses less digits than its factorization.

61439146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30719575.

The product of its digits is 15552, while the sum is 34.

The square root of 61439146 is about 7838.3127010856. The cubic root of 61439146 is about 394.5921036334.

The spelling of 61439146 in words is "sixty-one million, four hundred thirty-nine thousand, one hundred forty-six".