61514021 has 4 divisors (see below), whose sum is σ = 61622700. Its totient is φ = 61405344.

The previous prime is 61513993. The next prime is 61514027. The reversal of 61514021 is 12041516.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5428900 + 56085121 = 2330^2 + 7489^2 .

It is a cyclic number.

It is not a de Polignac number, because 61514021 - 2⁶ = 61513957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61513984 and 61514002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61514027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53486 + ... + 54623.

It is an arithmetic number, because the mean of its divisors is an integer number (15405675).

Almost surely, 2^61514021 is an apocalyptic number.

It is an amenable number.

61514021 is a deficient number, since it is larger than the sum of its proper divisors (108679).

61514021 is a wasteful number, since it uses less digits than its factorization.

61514021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108678.

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

The square root of 61514021 is about 7843.0874660429. The cubic root of 61514021 is about 394.7523331274.

Adding to 61514021 its reverse (12041516), we get a palindrome (73555537).

The spelling of 61514021 in words is "sixty-one million, five hundred fourteen thousand, twenty-one".