61424272 has 40 divisors (see below), whose sum is σ = 146476736. Its totient is φ = 24299136.

The previous prime is 61424257. The next prime is 61424303. The reversal of 61424272 is 27242416.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 61424272.

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, 19638 + ... + 22549.

Almost surely, 2^61424272 is an apocalyptic number.

It is an amenable number.

61424272 is an abundant number, since it is smaller than the sum of its proper divisors (85052464).

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

61424272 is a wasteful number, since it uses less digits than its factorization.

61424272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42215 (or 42209 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 61424272 is about 7837.3638425175. The cubic root of 61424272 is about 394.5602583740.

Adding to 61424272 its reverse (27242416), we get a palindrome (88666688).

The spelling of 61424272 in words is "sixty-one million, four hundred twenty-four thousand, two hundred seventy-two".