61421700 has 72 divisors (see below), whose sum is σ = 181113408. Its totient is φ = 16065920.

The previous prime is 61421687. The next prime is 61421713. The reversal of 61421700 is 712416.

It is an interprime number because it is at equal distance from previous prime (61421687) and next prime (61421713).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13969 + ... + 17831.

It is an arithmetic number, because the mean of its divisors is an integer number (2515464).

Almost surely, 2^61421700 is an apocalyptic number.

61421700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61421700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90556704).

61421700 is an abundant number, since it is smaller than the sum of its proper divisors (119691708).

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

61421700 is a wasteful number, since it uses less digits than its factorization.

61421700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933 (or 3926 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 61421700 is about 7837.1997550145. The cubic root of 61421700 is about 394.5547511962.

The spelling of 61421700 in words is "sixty-one million, four hundred twenty-one thousand, seven hundred".