61021411 has 16 divisors (see below), whose sum is σ = 68138496. Its totient is φ = 54180000.

The previous prime is 61021409. The next prime is 61021451. The reversal of 61021411 is 11412016.

It is a cyclic number.

It is not a de Polignac number, because 61021411 - 2¹ = 61021409 is a prime.

It is a super-2 number, since 2×61021411² = 7447225200861842, which contains 22 as substring.

It is a Duffinian number.

61021411 is a modest number, since divided by 21411 gives 61 as remainder.

It is not an unprimeable number, because it can be changed into a prime (61021451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141366 + ... + 141796.

It is an arithmetic number, because the mean of its divisors is an integer number (4258656).

Almost surely, 2^61021411 is an apocalyptic number.

61021411 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

61021411 is a deficient number, since it is larger than the sum of its proper divisors (7117085).

61021411 is a wasteful number, since it uses less digits than its factorization.

61021411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 61021411 is about 7811.6202544671. The cubic root of 61021411 is about 393.6957699396.

Adding to 61021411 its reverse (11412016), we get a palindrome (72433427).

The spelling of 61021411 in words is "sixty-one million, twenty-one thousand, four hundred eleven".