61214240 has 24 divisors (see below), whose sum is σ = 144619020. Its totient is φ = 24485632.

The previous prime is 61214233. The next prime is 61214261. The reversal of 61214240 is 4241216.

It can be written as a sum of positive squares in 2 ways, for example, as 59783824 + 1430416 = 7732^2 + 1196^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191135 + ... + 191454.

Almost surely, 2^61214240 is an apocalyptic number.

It is an amenable number.

61214240 is an abundant number, since it is smaller than the sum of its proper divisors (83404780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61214240 is a wasteful number, since it uses less digits than its factorization.

61214240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382604 (or 382596 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 61214240 is about 7823.9529650938. The cubic root of 61214240 is about 394.1100296511.

Adding to 61214240 its reverse (4241216), we get a palindrome (65455456).

The spelling of 61214240 in words is "sixty-one million, two hundred fourteen thousand, two hundred forty".